Anthropometric measurements in the elderly: Age and gender differences

Article (PDF Available)inBritish Journal Of Nutrition 87(2):177-86 · February 2002with360 Reads
Source: PubMed
Abstract
In clinical practice and epidemiological surveys, anthropometric measurements represent an important component of nutritional assessment in the elderly. The anthropometric standards derived from adult populations may not be appropriate for the elderly because of body composition changes occurring during ageing. Specific anthropometric reference data for the elderly are necessary. In the present study we investigated anthropometric characteristics and their relationship to gender and age in a cross-sectional sample of 3,356 subjects, randomly selected from an elderly Italian population. In both sexes, weight and height significantly decreased with age while knee height did not. The BMI was significantly higher in women than in men (27.6 SD 5.7 v. 26.4 SD 3.7; P<0.001) and it was lower in the oldest than in the youngest subjects (P<0.05) of both genders. The 75th year of age was a turning point for BMI as for other anthropometric measurements. According to BMI values, the prevalence of malnutrition was lower than 5 % in both genders, whereas obesity was shown to have a higher prevalence in women than in men (28% v. 16%; P<0.001). Waist circumference and waist: hip ratio values were higher for the youngest men than for the oldest men (P<0.05), whereas in women the waist: hip ratio values were higher in the oldest women, suggesting that visceral redistribution in old age predominantly affects females. In conclusion, in the elderly the oldest subjects showed a thinner body frame than the youngest of both genders, and there was a more marked fat redistribution in women.
Anthropometric measurements in the elderly: age and gender differences
Egle Perissinotto
1
*, Claudia Pisent
2
, Giuseppe Sergi
2
, Francesco Grigoletto
1
and Giuliano Enzi
2
for the
ILSA Working Group†
1
Department of Environmental Medicine and Public Health, University of Padua, Italy
2
Department of Medical and Surgical Sciences, Division of Geriatrics, University of Padua, Italy
(Received 1 March 2001 Revised 17 July 2001 Accepted 3 September 2001)
In clinical practice and epidemiological surveys, anthropometric measurements represent an
important component of nutritional assessment in the elderly. The anthropometric standards
derived from adult populations may not be appropriate for the elderly because of body
composition changes occurring during ageing. Specific anthropometric reference data for the
elderly are necessary. In the present study we investigated anthropometric characteristics and
their relationship to gender and age in a cross-sectional sample of 3356 subjects, randomly
selected from an elderly Italian population. In both sexes, weight and height significantly
decreased with age while knee height did not. The BMI was significantly higher in women than in
men (27
:
6
SD 5
:
7 v. 26
:
4 SD 3
:
7; P,0
:
001) and it was lower in the oldest than in the youngest
subjects (P,0
:
05) of both genders. The 75th year of age was a turning point for BMI as for other
anthropometric measurements. According to BMI values, the prevalence of malnutrition was
lower than 5 % in both genders, whereas obesity was shown to have a higher prevalence in
women than in men (28 % v.16%;P,0
:
001). Waist circumference and waist : hip ratio values
were higher for the youngest men than for the oldest men (P,0
:
05), whereas in women the
waist : hip ratio values were higher in the oldest women, suggesting that visceral redistribution in
old age predominantly affects females. In conclusion, in the elderly the oldest subjects showed a
thinner body frame than the youngest of both genders, and there was a more marked fat
redistribution in women.
Anthropometry: Nutritional status: Elderly: Cross-sectional
Anthropometric and nutritional characteristics are related to
genetic, environmental, sociocultural conditions and to
lifestyle, health and functional status. This makes it difficult
to give a standard interpretation of their values. Anthro-
pometry is an essential tool in geriatric nutritional
assessment to evaluate underweight and obesity conditions,
which are both important risk factors for severe diseases and
disability in the elderly (Jensen & Rogers, 1998; Visser et al.
1998).
An accurate evaluation of nutritional status should
include an estimate of body compartments (fat-free mass
and fat mass) by instrumental methods such as bioelectrical
impedance analysis and dual X-ray absorptiometry (Enzi
et al. 1997). Nevertheless, in clinical practice and in
epidemiological surveys, body composition can be
indirectly estimated by anthropometric measurements,
which are non-invasive, easy and inexpensive to collect.
The ageing process involves modifications in nutritional
and physiological status, such as a decrease in body weight
and height (Dey et al. 1999), and a reduction in fat-free mass
associated with an increase in fat mass. Moreover, a
redistribution of adipose tissue occurs with accumulation in
the trunk and visceral sites (Steen, 1988; Schwartz, 1998).
Body composition changes occur differently in men and
women and in the various phases of ageing, influencing
anthropometry. Consequently, the anthropometric standard
values derived from adult populations may not be applicable
to the elderly.
Non-pathological factors affecting the distribution of
anthropometric characteristics, such as age, gender and
geographic area, should be taken into account. The WHO
Expert Committee on Physical Status stressed the need for
local gender- and age-specific reference values for the
elderly (de Onis & Habicht, 1996). In Europe, only a few
anthropometric and nutritional studies have been carried out
in the elderly (de Groot et al. 1996; Launer & Harris, 1996;
* Corresponding author: Dr E. Perissinotto, fax +39 049 827 5392, email egle.perissinotto@unipd.it
See the Appendix for a list of the ILSA Working Group members.
Abbreviation: ILSA, Italian Longitudinal Study on Ageing.
British Journal of Nutrition (2002), 87, 177–186 DOI: 10.1079/BJN2001487
q The Authors 2002
Dey et al. 1999). The use of non-standardised methods for
data collection and insufficient sample sizes make it difficult
to compare reference values for clinical and epidemiologi-
cal purposes.
Longitudinal studies are required to determine the
magnitude of changes in anthropometric measures with
ageing, but cross-sectional data have often been used, even
though they might be affected by secular trend or cohort
effect. Longitudinal and cross-sectional studies have,
however, reported similar results on the effect of ageing
on anthropometric and nutritional characteristics (Rea et al.
1997; Sorkin et al. 1999).
The principal aims of the present study were: (1) to
provide distribution values for anthropometric character-
istics based on a large cross-sectional sample randomly
drawn from an elderly Italian population; (2) to quantify the
prevalence of obesity and underweight conditions among
the elderly in Italy; (3) to describe the age and gender
differences of anthropometric characteristics in the elderly.
Methods
The present survey was based on anthropometric data
derived from the Italian Longitudinal Study on Ageing
(ILSA). The study had both a cross-sectional and a
longitudinal component. Prevalence data obtained between
March 1992 and June 1993 are considered here.
The design and methods of the study have been reported
elsewhere (Maggi et al. 1994). Briefly, a gender- and age-
stratified sample of 5462 subjects aged 6584 years was
randomly drawn from the demographic lists of the registry
office in eight municipalities: Genoa, Segrate (Milan),
Selvazzano-Rubano (Padua), Impruneta (Florence), Fermo
(Ascoli Piceno), Naples, Casamassima (Bari) and Catania.
In order to oversample older people, an equal allocation
strategy was used. The participation rate was 83 % (4521
subjects). The study had two phases: a screening phase and a
disease diagnosis phase. The screening phase of the study
included a personal interview, a nurse visit and a clinical
evaluation. The clinical evaluation included cognitive,
psychological and physical examinations, anthropometric
measurements and diet information. The second phase
consisted of clinical confirmation of disease by a specialist.
Details about diagnostic criteria and the health status of the
sample have been described elsewhere (The ILSA Group,
1997).
Anthropometric measurements were collected from
74
:
2 % (3356/4521) of the participants. The principal
causes for missing data were, in decreasing order: refusal
(81 %), death (10 %), upright incapability (4 %). The non-
measurement rate depended on gender (P,0
:
05) and age
(P,0
:
01), being higher for the oldest women. Subjects who
were measured and those who were not measured also
differed regarding health status and disability. The
prevalence rates of myocardial infarction, cardiac arrythmia
and hypertension were higher (P,0
:
001) in subjects who
were measured, while dementia, distal symmetric neuro-
pathy of lower limbs and disability were more frequent
(P,0
:
001) among those not measured. The two groups did
not significantly differ in the prevalence of diabetes, stroke,
angina pectoris, congestive heart failure or peripheral artery
disease.
Anthropometric measures
Anthropometric measurements were taken by trained
personnel during clinical evaluation. Height and weight
were measured with the subject barefooted and lightly
dressed. Knee height was measured with a sliding caliper on
the leg of the participant while seated and represented the
distance from the sole of the foot to the anterior surface of
the thigh, with the ankle and knee each flexed to a right
angle, according to Chumlea et al. (1985). Body weight was
measured on a balance beam platform scale (Salus, Milan,
Italy) to the nearest 0
:
1 kg. Height was taken by a
stadiometer (Salus) at head level to the nearest centimetre
with the subject standing barefoot, with feet together. BMI
was calculated (Quetelet, 1835). Three measurements of
four skinfold thicknesses (triceps, subscapular, suprailiac,
thigh) were taken by means of a calibrated caliper (precision
0
:
2 mm; Harpenden skinfold caliper, John Bull British
Indictor Ltd, UK) and averaged. The triceps skinfold was
taken at the posterior mid-point between the acromion and
the olecranon. The subscapular skinfold was measured just
to the inferior angle of the scapula. The suprailiac skinfold
was taken at the upper point of the iliac crest, the angle of
inclination being 458 towards the pubic symphysis. The
thigh skinfold was measured at the medial point of the
anterior surface of the thigh.
Circumferences were measured to the nearest centimetre
using a flexible steel tape, with the subject standing. The
abdominal circumference (waist) was measured at the
end of expiration, by wrapping the tape at the level of
the umbilicus. The hip circumference was measured at the
maximum posterior protrusion of the buttocks. The
waist : hip ratio was obtained by dividing the values of
the two circumferences.
To evaluate the prevalence of undernutrition and obesity
in our sample, we classified subjects on the basis of two cut-
off points commonly used in clinical practice: BMI
,20 kg/m
2
was used to identify underweight subjects;
BMI $ 30 kg=m
2
was used to indicate obesity.
Statistical analysis
Anthropometric measurements were presented as mean
value, standard deviation and centiles (5th, 10th, 25th, 50th,
75th, 90th, 95th) by gender and age group (65 69, 7074,
7579, 80 84 years). For the whole sample, the means,
standard deviations and prevalences were adjusted by
weighting for the 1991 Italian population, to avoid bias
derived from oversampling of the oldest subjects and
different rates of response across strata (Kish, 1965).
Variability was also expressed by the CV. Data were
verified for their consistency. Missing data were not
replaced by estimated values. The statistical analysis was
performed by computation using the SAS Statistical
Software Package version 6.12 (SAS Institute, Cary, NC,
USA). The statistical significance of differences between
genders was tested using Student’s t test ða ¼ 0
:
05Þ: The
effect of age was investigated by ANOVA (SAS GLM
E. Perissinotto et al.178
procedure) and Tukey’s multiple comparisons procedure
ða ¼ 0
:
05Þ: Differences among prevalences were tested by
the x
2
test and expressed as odds ratio. The association
between age and anthropometric values, both considered as
continuous variables, was evaluated using linear and
quadratic regression models. To test the hypothesis of
parallelism of regression lines we used a single regression
model (SAS GLM procedure) containing dummy variables,
to distinguish the groups being compared and verifying the
interaction effect (Kleinbaum et al. 1998).
Results
Gender- and age-specific values (mean, standard deviation
and centiles) are presented in the following analysis.
Specific age and gender values neutralise selection bias
deriving from different response rates in age and gender
strata.
Men were taller than women (165
:
7
SD 6
:
7 v. 152
:
2 SD
7
:
5 cm) and the difference in the total group, as in each age
group, was statistically significant (P,0
:
001). The varia-
bility was similar (CV about 5 %) in the two genders. Height
was close to the normal distribution and showed a
significant decrease with age in both sexes (P,0
:
001).
Older men were 2
:
7 % shorter than younger men (167
:
1
SD
7
:
5 v. 162
:
7 SD 7
:
2 cm), while women had an age-related
reduction in height of 4 % (154
:
1
SD 6
:
7 v. 149
:
3 SD 7
:
0 cm).
In women, height decreased at a constant rate with age,
while in men Tukey’s test indicated a significant difference
between the first two and the second two age groups
(Tables 1 and 2). For both genders, the linear regression
model applied to crude data (Fig. 1) was more suitable for
representing the age-related height decrease, showing the
two linear equations as having the same mean decrement per
year (20
:
30 cm/year).
Knee height was significantly higher in men than in
women (50
:
4
SD 4
:
3 v. 45
:
8 SD 3
:
8 cm) but it did not vary
significantly with age.
Tables 1 and 2 show that men were heavier than women
in each age group (P,0
:
001). In both genders the mean
weight significantly decreased with age (P,0
:
001). In men
this age-related reduction represented 11 % of the weight of
younger men (8 kg), while in women this reduction was
about 9 % of the weight of younger women (6 kg). In both
genders, mean values of weight were slightly higher than
medians (0
:
51 kg for males; 11
:
5 kg for females)
showing a slight right asymmetry in the distribution, as
has been described by other authors (Fanelli Kuczmarski
et al. 2000). The variability in women (CV 20
:
5 %) was
higher than in men (CV 14
:
7 %).
Table 1. Anthropometric indices in men (Italian Longitudinal Study on Ageing survey)
(Mean values, standard deviations and centiles)
Centile
Age group n Mean
SD 5 102550759095
Weight (kg)†‡ 6569 466 74
:
6
a
11
:
258616774818994
7074 451 74
:
4
a
11
:
957606673819196
7579 392 69
:
5
b
10
:
753556269778486
8084 365 66
:
7
c
10
:
750535966748084
All men 1674 72
:
6* 10
:
7* 54 57 64 71 78 86 92
Height (cm)†‡ 6569 469 167
:
1
a
7
:
5 155 157 162 167 172 177 180
7074 457 166
:
3
a
6
:
4 156 159 162 166 170 175 177
7579 407 163
:
8
b
6
:
6 153 156 159 163 168 172 175
8084 384 162
:
7
c
7
:
2 151 153 158 162 168 172 175
All men 1717 165
:
7* 6
:
7* 154 156 160 165 170 175 177
BMI†‡ (kg/m
2
) 6569 465 26
:
8
a
4
:
221
:
222
:
324
:
326
:
628
:
731
:
232
:
5
7074 448 27
:
0
a
3
:
920
:
822
:
224
:
326
:
529
:
132
:
033
:
9
7579 391 26
:
0
b
3
:
620
:
421
:
423
:
426
:
028
:
231
:
232
:
4
8084 362 25
:
2
c
3
:
619
:
620
:
823
:
025
:
027
:
429
:
630
:
8
All men 1666 26
:
4* 3
:
7* 20
:
721
:
723
:
726
:
028
:
431
:
232
:
7
Waist circumference (cm)‡ 6569 467 98
:
1
a
10
:
2 82 85 92 98 104 111 116
7074 458 98
:
5
a
11
:
1 81 85 92 98 105 112 117
7579 409 96
:
4
b
10
:
7 79 83 89 97 103 110 114
8084 395 94
:
8
c
11
:
3 77 82 88 95 102 108 112
All men 1729 97
:
5* 9
:
9* 80 84 90 97 104 110 115
Hip circumference (cm)†‡ 6569 467 100
:
6
a
8
:
4 89 92 96 100 105 111 115
7074 458 101
:
0
a
9
:
6 89 92 96 101 106 112 117
7579 409 99
:
6
a
8
:
9 87 90 94 100 105 110 115
8084 387 98
:
3
b
9
:
6 86 89 94 98 104 109 112
All men 1721 100
:
2* 8
:
3* 88 91 95 100 105 110 115
Waist:hip ratio†‡ 6569 466 0
:
97
a
0
:
05 0
:
88 0
:
90 0
:
93 0
:
97 1
:
01 1
:
04 1
:
06
7074 456 0
:
97
a
0
:
06 0
:
88 0
:
90 0
:
94 0
:
97 1
:
00 1
:
04 1
:
07
7579 404 0
:
96
b
0
:
05 0
:
87 0
:
90 0
:
93 0
:
96 1
:
00 1
:
03 1
:
05
8084 384 0
:
95
c
0
:
06 0
:
86 0
:
88 0
:
92 0
:
95 0
:
99 1
:
02 1
:
04
All men 1710 0
:
97* 0
:
05* 0
:
87 0
:
89 0
:
93 0
:
96 1
:
00 1
:
03 1
:
05
a,b,c
For the same variable, mean values with unlike superscript letters were significantly different (P,0
:
05).
* Weighted mean and standard deviation values.
Statistically significant difference of mean values between genders (Student’s t test).
Statistically significant difference of mean values across age groups (ANOVA).
Anthropometric measurements in the elderly 179
In examining the trend of weight by age, the rate of
decrease was found to be more evident for men than for
women, showing a more consistent loss of fat-free mass
(Gallagher et al. 1997). In men, Tukey’s multiple
comparisons test showed a significant difference between
the mean values of weight of the three oldest age groups of
5-year periods taken two-by-two, while in women only the
first two age groups were significantly heavier than the
second two age groups. In both genders, Tukey’s test
indicated the 75th year of age as a starting point for
significant weight loss (Tables 1 and 2). Linear regression
between weight and age is shown in Fig. 2. The slopes of the
Fig. 1. Height by age (1-year age groups) and gender: men (W) y ¼ 20
:
30
x 1 187
:
2; women (.) y ¼ 20
:
30 x 1 174
:
2. Points are means with their standard
errors represented by vertical bars.
Table 2. Anthropometric indices in women (Italian Longitudinal Study on Ageing survey)
(Mean values, standard deviations and centiles)
Centile
Age group n Mean
SD 5 102550759095
Weight (kg)†‡ 6569 418 66
:
2
a
12
:
049525865738190
7074 370 64
:
8
a
12
:
546515563738185
7579 361 61
:
1
b
10
:
645485461687679
8084 313 60
:
0
b
11
:
742465259677780
All women 1462 63
:
8* 13
:
1* 45 49 55 62 71 79 84
Height (cm)†‡ 6569 436 154
:
1
a
6
:
7 143 146 150 154 159 163 165
7074 379 152
:
3
b
6
:
5 142 144 148 152 157 160 163
7579 373 150
:
6
c
6
:
4 141 143 146 151 155 159 161
8084 329 149
:
3
d
7
:
00 138 141 144 149 154 158 160
All women 1517 152
:
2* 7
:
5* 141 143 147 152 156 160 163
BMI†‡ (kg/m
2
) 6569 417 28
:
0
a
5
:
221
:
022
:
124
:
427
:
330
:
635
:
237
:
4
7074 368 27
:
9
a
5
:
020
:
421
:
924
:
327
:
431
:
233
:
836
:
0
7579 361 27
:
1
b
5
:
220
:
021
:
223
:
726
:
529
:
932
:
434
:
4
8084 308 27
:
1
b
5
:
818
:
920
:
423
:
526
:
730
:
133
:
435
:
6
All women 1454 27
:
6* 5
:
7* 20
:
121
:
52427303436
:
4
Waist circumference (cm) 6569 440 97
:
2
a
13
:
275
:
5 80 89 97 105
:
5 114 121
:
5
7074 389 97
:
4
a
12
:
9 76 80 89 98 106 114 119
7579 375 96
:
2
a
12
:
4 75 80 88 96 104 112 117
8084 346 96
:
5
a
12
:
8 75 80 89 97 105 113 117
All women 1550 96
:
9* 14
:
1* 75 80 88 97 106 113 118
Hip circumference (cm)†‡ 6569 440 104
:
5
a
11
:
5 88 91 97 103 110 119 125
7074 390 104
:
0
a
10
:
7 88 92 96 103 111 117
:
5 123
7579 373 102
:
3
b
10
:
4 87 90 96 101 109 116 122
8084 347 101
:
5
b
11
:
4 85 89 95 102 108 116 120
All women 1550 103
:
4* 12
:
1* 87 90 96 102 110 117 123
Waist:hip ratio† 6569 438 0
:
93
a
0
:
06 0
:
80 0
:
83 0
:
88 0
:
93 0
:
97 1
:
01 1
:
04
7074 389 0
:
93
a
0
:
07 0
:
81 0
:
84 0
:
89 0
:
93 0
:
98 1
:
02 1
:
04
7579 372 0
:
94
a
0
:
07 0
:
82 0
:
85 0
:
90 0
:
93 0
:
98 1
:
02 1
:
04
8084 345 0
:
95
b
0
:
06 0
:
83 0
:
86 0
:
90 0
:
95 0
:
99 1
:
03 1
:
05
All women 1544 0
:
94* 0
:
08* 0
:
81 0
:
84 0
:
89 0
:
94 0
:
98 1
:
02 1
:
04
a,b,c,d
For the same variable, mean values with unlike superscript letters were significantly different (P,0
:
05).
* Weighted mean and standard deviation values.
Statistically significant difference of mean values between genders (Student’s t test).
Statistically significant difference of mean values across age groups (ANOVA).
E. Perissinotto et al.180
regression lines seem to indicate a greater rate of weight
decrease in men (20
:
59 kg/year) than in women (20
:
44 kg/
year), but the difference was not significant (P¼0
:
08),
perhaps owing to the high variability of weight. The
quadratic regression model, applied to crude data, provided
a slightly better fit of the distribution than the linear model
in the men only, indicating an increasing rate of weight loss
with age.
The mean BMI was significantly higher in women than in
men in the whole group (27
:
6
SD 5
:
7 v. 26
:
4 SD 3
:
7 kg/m
2
)
and in each age class. This index decreased significantly
with age in both genders, showing a reduction of about 1
unit over two decades. The slight asymmetric distribution of
the BMI reflects the asymmetry reported for weight.
Moreover, women presented a higher variability (CV
20
:
7 %) than men (CV 14
:
0 %), reflecting the higher
variability in weight.
The BMI reduction was regular in men only (Fig. 3).
Tukey’s test showed that in men the decrease became
statistically significant after the 75th year of age, while in
women, after a significant change at about the same age, the
mean of the index did not change. The 75th year of age was
a turning point in age-related changes for BMI as well as for
other anthropometric measurements.
The adjusted prevalence of underweight was 3
:
6 % in the
whole sample and higher in women (4
:
3 %) than in men
(2
:
7 %). The higher risk for women to be underweight was
quantified by odds ratio 1
:
5 (95 % CI 1
:
0, 2
:
1).
Obesity was a diffuse condition among the elderly, with
an overall adjusted prevalence of 22
:
3 %. The problem was
more frequent in women (27
:
9 %) than in men (15
:
5%)
(Fig. 4). The higher risk of obesity for women was evaluated
by odds ratio 2
:
2 (95% CI 1
:
9, 2
:
6).
The mean value of waist circumference did not differ
significantly between the two genders (97
:
5
SD 9
:
9 in men v.
96
:
9
SD 14
:
1 cm in women), and decreased significantly
with age, in men only. Differing from waist circumference,
the mean value of hip circumference was significantly
higher in women than in men (103
:
4
SD 12
:
1 v. 100
:
2 SD
8
:
3 cm), reflecting the thicker gluteal subcutaneous fat in
Fig. 2. Weight by age (1-year age groups) and gender: men (W) y ¼ 20
:
59
x 1 115
:
2; women (.) y ¼ 20
:
44 x 1 95
:
7. Points are means with their standard
errors represented by vertical bars.
Fig. 3. BMI by age (1-year age groups) and gender: men (W) y ¼ 20
:
12 x 1 35
:
3;
women (.) y ¼ 20
:
09 x 1 33
:
9. Points are means with their standard errors rep-
resented by vertical bars.
Anthropometric measurements in the elderly 181
women. The hip circumference decreased significantly with
age in both sexes.
The mean waist : hip ratio was significantly higher in men
(0
:
97
SD 0
:
05 v. 0
:
94 SD 0
:
08), where it showed a significant
age-related reduction, while in women this rate slightly but
significantly increased with age.
The mean values of the four skinfold thicknesses were
significantly (P,0
:
001) higher in women than in men
(triceps 20
:
5
SD 8
:
3 v. 12
:
3 SD 5
:
8 mm; subscapular 19
:
3 SD
9
:
1 v. 16
:
7 SD 6
:
1 mm; suprailiac 19
:
8 SD 9
:
7 v. 14
:
0 SD
6
:
6 mm; thigh 24
:
3 SD 10
:
6 v. 14
:
3 SD 6
:
7 mm). For these
variables, in both genders the age-related reduction (data not
shown) was statistically significant (P,0
:
01).
Discussion
In the present cross-sectional study we investigated
anthropometric measurements in an elderly population and
compared our findings with those provided by similar
studies. The lack of anthropometric cross-sectional surveys
in Italian populations limits the comparison of our gender-
and age-specific results with those produced by other
studies. Between 1988 and 1993 a European multicentre
study (Euronut Seneca Study) on nutrition and anthropo-
metric characteristics was carried out on a sample of 2332
elderly subjects born between 1913 and 1918 in twelve
European countries (de Groot et al. 1992, 1996). For the
same age group, our sample somatotype was similar to that
described by the Seneca Study (Table 3) for Italian men and
women (de Groot et al. 1991). The comparison between the
characteristics of our subjects and those of European
populations confirms that the Italian elderly population is in
the lower mid-section of the distribution (Table 3). With
reference to a typical Mediterranean somatotype, our
Table 3. Weight, height and BMI by gender, in subjects 70 75 years of age. Comparison of results of the Italian Longitudinal Study on Ageing
(ILSA) with the values provided by de Groot et al. (1991) for selected European sites
(Mean values and standard deviations)
Men Women
Country
Weight (kg) Height (m) BMI (kg/m
2
) Weight (kg) Height (m) BMI (kg/m
2
)
Mean
SD Mean SD Mean SD Mean SD Mean SD Mean SD
Denmark (Roskilde) 75
:
010
:
41
:
71 0
:
07 25
:
53
:
264
:
512
:
41
:
59 0
:
05 25
:
24
:
7
The Netherlands (Culemborg) 78
:
210
:
71
:
73 0
:
08 26
:
13
:
071
:
411
:
41
:
60 0
:
06 27
:
64
:
2
Belgium (Hamme) 71
:
410
:
51
:
69 0
:
07 25
:
23
:
368
:
210
:
31
:
53 0
:
06 28
:
34
:
2
France (Haguenau) 77
:
912
:
71
:
68 0
:
06 27
:
13
:
668
:
114
:
41
:
57 0
:
06 27
:
63
:
6
Greece (Markopoulo) 76
:
812
:
71
:
67 0
:
06 27
:
54
:
369
:
310
:
31
:
52 0
:
06 29
:
72
:
6
Spain (Bentazos) 77
:
210
:
61
:
62 0
:
08 27
:
73
:
665
:
511
:
21
:
49 0
:
06 28
:
64
:
4
Portugal (Vila Franca de Xira) 70
:
611
:
21
:
61 0
:
06 27
:
03
:
660
:
211
:
01
:
46 0
:
05 27
:
54
:
5
Italy (Padua) 73
:
610
:
01
:
67 0
:
06 26
:
13
:
561
:
010
:
91
:
56 0
:
06 24
:
94
:
2
Italy (Fara Sabina, Magliano Sabina,
Poggio Mirteto)
77
:
615
:
21
:
60 0
:
05 30
:
35
:
268
:
213
:
41
:
49 0
:
06 30
:
5(5
:
1)
ILSA 74
:
411
:
91
:
66 0
:
06 27
:
03
:
964
:
812
:
51
:
52 0
:
06 27
:
95
:
0
Fig. 4. Underweight (BMI ,20 kg/m
2
; B); and obesity (BMI $30 kg/m
2
; n) prevalences by gender (men (a) and women (b)) for 5-year age
categories.
E. Perissinotto et al.182
subjects are smaller, and the women, in relation to height,
are heavier than Northern European subjects. Further
comparisons with data provided by other European studies
confirmed these findings (Delarue et al. 1994; Bannerman
et al. 1997). Considering American anthropometric data
from the third National Health and Nutrition Examination
Survey (NHANES III), our subjects appeared shorter and
the women, adjusting for height, heavier than the Americans
(Fanelli Kuczmarski et al. 2000).
In considering anthropometric indicators, it is crucial to
establish the pattern of their relationship with selected
characterising factors such as age and gender. Even though
derived from a cross-sectional study, the highlighted
patterns of gender- and age-related changes in weight and
stature seem to correspond to those described in some
longitudinal studies (de Groot et al. 1996; Dey et al. 1999;
Sorkin et al. 1999).
In our 6584-year sample, age was inversely and
significantly associated with ten out of twelve anthropo-
metric indices in both genders with the exception of waist
circumference in women and knee height in both men and
women. The mean values of all anthropometric measure-
ments significantly differed between gender, except for
waist circumference. Weight, height, knee height and
waist : hip ratio were higher in men; BMI, hip circumfer-
ence, thigh circumference and skinfold thickness were
greater in women.
Height
The remarkable entity of height decrease observed in our
present study (23 cm/decade) is comparable with the
results of other Italian and international surveys: the
Euronut Seneca Study reported a height decrease in both
men and women of 1 2 cm in 4 years, i.e. 2
:
55 cm/decade.
For Swedish elderly, Dey et al. (1999) quantified a mean
decrement of 45 cm over 25 years. Baumgartner et al.
(1995b ) reported a decrease of 0
:
5–1
:
5 cm/decade.
We considered the possible role of a secular trend in the
remarkable height decrease observed in our study. As many
authors assert, in developed countries a positive trend in
stature began about the second part of the nineteenth century
and was more evident for men than for women (Malina,
1990; Meadows Janz & Janz, 1999). This occurred also in
Italy, where the mean stature of young males called up for
the army in 1928 and 1943 (corresponding to our oldest and
youngest age group called up by year) differed by 1
:
5cm
(ISTAT, 1986). Mean stature between our youngest and
oldest men differed by 45 cm, a decrease three times
higher than that potentially due to the secular trend. It
should be noted that the positive secular trend was more
evident in distal lower limb bones and consequently in knee
height (Meadows Janz & Janz, 1999); in our data, knee
height did not correlate with age. If the youngest subjects
were taller than the oldest subjects because of the positive
secular trend, the same relationship would be expected in
knee height, but this was not the case. We conclude that the
possible effect of the secular positive trend was not the sole
cause of the difference in stature of the youngest and oldest
subjects observed in our present study.
The above considerations justify the conclusion that our
oldest subjects had a basal body height similar to the
youngest subjects and that this decreased with age
principally because of spinal deformity and thinning of
the intervertebral discs.
Weight
In contrast to height, weight may voluntarily or involunta-
rily fluctuate during adulthood and older life. This makes it
more difficult to investigate the role of weight in health by
cross-sectional data. Our results indicate a negative
association between weight and age in both sexes. This
trend may be a consequence of a selection bias due to the
death of overweight or obese subjects. However, whole
weight distributions of all age groups shifted towards lower
values (Tables 1 and 2). The decrease with regard to 65
69-year-old subjects was about 14 % for the 5th centile v.
about 11 % for the 95th centile.
Furthermore, a cohort effect might have biased our
results. There could be a confounding height effect if
younger subjects were the tallest (height and weight being
positively correlated), but, as previously explained, this was
not so. A further matter could be that overweight may be
less prevalent in an older population who had lived through
a double war experience, but that argument is more
complex. In spite of these considerations, longitudinal
studies support an age-related weight reduction (Going et al.
1995; de Groot et al. 1996; Dey et al. 1999). Examining
longitudinal changes for a sample of 70-year-olds in
Sweden, Dey et al. (1999) found a mean decrement of the
same order as ours (20
:
4 kg/year) over a 20-year period.
BMI
Among all anthropometric measurements, the BMI
represents the easier and most frequently used index to
identify subjects at risk for under- or overnutrition. Many
authors agree in considering this index a poor indicator of
risk in the elderly (Harris et al. 1988; Visser et al. 1994,
Allison et al. 1997; Seidell & Visscher, 2000), because it
does not reflect regional distribution of fat or any change in
fat distribution in the elderly. The value of the BMI is
generally considered to be as a measurement of fatness,
while it also gives information about fat-free mass. In the
elderly, fat mass increases whereas fat-free mass decreases
(Steen, 1988). The same adult BMI value corresponds to a
more fatty body composition in the elderly. Thus the BMI
has to be differently interpreted for elderly subjects.
Undernutrition and obesity BMI thresholds in the elderly are
currently being discussed. It is questionable whether cut-off
values for obesity should be higher in the elderly, as body
weight associated with minimal mortality increases with age
(Allison et al. 1997) and the relative risk of mortality
associated with a higher BMI decreases with age (Stevens
et al. 1998). On the other side of the scale, undernutrition is
a well-known predictor of mortality (Visscher et al. 2000),
and modification of cut-off values to identify patients at
nutritional risk has been suggested (Corish et al. 2000).
Some data on the BMI of the Italian population have
been produced by the National Research Council through a
cross-sectional multicentre study carried out in 1984 on
Anthropometric measurements in the elderly 183
6595-year-old subjects (Melchionda et al. 1990).
Comparing BMI between the ILSA and the National
Research Council study, similar values were found for the
50th centile (26
:
0 kg/m
2
in both studies for men; 27
:
0 v.
27
:
7 kg/m
2
for women) of the total sample distributions.
Differences between the results of the two studies were
found for all the centiles related to women in the 65
74-year age group, for which ILSA values were
approximately 1 unit smaller than National Research
Council values. Given the more recent collection of the
ILSA data, the lower BMI values reported by ILSA for the
youngest women might reflect a change of the cultural
model in controlling nutritional habits. As compared with
NHANES III data (Fanelli Kuczmarski et al. 2000) our
obesity prevalence was similar.
In both genders the prevalence of obesity (Fig. 4)
decreased with age, while the prevalence of underweight
increased; this is in accordance with the pattern described by
other authors for different populations (Launer & Harris,
1996). In our data, a BMI of 30 kg/m
2
corresponded to
different centiles in the two sexes: 85th for men and 75th for
women. Relating the concept of ‘normality’ (i.e. non-
obesity) to the most frequent values in the population, it
seems that this cut-off value could overestimate the obesity
in the Italian population, particularly in women. Obesity
should probably be identified by different cut-off points for
men and women.
In our male and female BMI distributions, a BMI of
20 kg/m
2
approximately corresponded to the 5th centile.
This could provide a useful estimate of an underweight
condition in the Italian elderly. Whereas for adults a lower
cut-off for BMI (,18
:
5kg/m
2
) is considered (WHO, 1995),
the criterion of BMI ,20 kg/m
2
is widely adopted in
geriatric clinical practice (Mattila et al. 1986; McWhirter &
Pennington, 1994; Launer & Harris, 1996; Corish et al.
2000). A lower cut-off value might be inappropriate;
because of the higher BMI values amongst older
populations, a more severe degree of undernutrition may
be selected. However, early detection is more important of
those who may be at nutritional risk.
Waist:hip ratio and waist circumference
Metabolic changes occur in the elderly: a lean tissue loss, a
decrease in total body water and a more central distribution
of adiposity (Enzi et al. 1986; Chumlea & Baumgartner,
1989; Schwartz, 1998). The increase in intra-abdominal fat
accumulation occurs in both genders, first in men then in
women, where it occurs in the postmenopausal period (Enzi
et al. 1986; Chumlea & Baumgartner, 1989; Kotani et al.
1994). In the adult population, the waist:hip ratio
(Baumgartner et al. 1995a) and waist circumference
(Pouliot et al. 1994; Han et al. 1995; Lean et al. 1995;
Seidell et al. 2001) are commonly used as indicators of
visceral adiposity. Reference data regarding the waist:hip
ratio and waist circumference are not available for the
Italian elderly, and other cross-sectional and longitudinal
studies have not included subjects older than 75 years of
age. Our findings allow consideration of a later phase of
physiological ageing.
In the present study, elderly men showed an age-related
decrease in waist circumference, hip circumference,
waist:hip ratio and all skinfold thicknesses. This may
suggest that in men the fat increase with accumulation at
visceral sites occurs predominatly in middle age, while the
most remarkable phenomenon in the elderly is the reduction
in body frame, fat and muscle mass.
Anthropometric variations pointed out for women
indicate a different pattern in the relationship between fat
distribution and age. Being in a late postmenopausal period,
our women presented a morphological evolution markedly
reflecting the lack of estrogenic effects. In contrast to
increases in anthropometric values (waist and hip
circumferences, BMI, weight) found in younger postmeno-
pausal women (Den Tonkelaar et al. 1989; Schwartz, 1998)
we found a general anthropometric decrement with the only
increase in waist:hip ratio, mainly due to the decrease in hip
circumference, which has also been reported by other
studies (de Groot et al. 1996). Our findings are consistent
with the hypothesis of an increase in visceral adiposity in
postmenopausal women, highlighted by many studies, most
of which are based on computed tomography scans (Kotani
et al. 1994; Zamboni et al. 1997). Despite abdominal
skinfolds becoming thinner with age, waist circumference
does not vary, suggesting an increase in visceral fat.
In younger populations the waist:hip ratio, usually
employed to distinguish visceral from subcutaneous obesity,
is an independent predictor of CHD and metabolic
disturbances. Contrary to the men, our women had mean
values of the waist:hip ratio commonly considered to be
associated with an increased risk of mortality (Heymsfield
et al. 1998) in the young. Moreover, many authors consider
waist circumference to be better correlated with abdominal
visceral adipose tissue, as a potentially ‘atherogenic’
metabolic disease source, than the waist : hip ratio (Pouliot
et al. 1994), which depends both on visceral fatness and
muscle mass quantified by hip circumference (Seidell et al.
1997). This issue is still under debate (Molarius & Seidell,
1998). On the basis of defined upper levels of waist
circumference (88 cm for women and 102 cm for men)
suggested by Lean et al. (1995), over 75 % of our women
could be considered obese, in relation to cardiovascular risk.
The analysis of our longitudinal data could clarify whether
such high mean values of the waist : hip ratio and waist
circumference in elderly women are associated with a
higher risk of morbidity and mortality.
The present study has some limits. First of all, it was a
cross-sectional study and therefore we cannot exclude
survival or birth-cohort bias or discount temporal or cohort
effects. The cross-sectional part of the study did not allow
evaluation of individual changes for anthropometric
characteristics. As a consequence, we dealt with the
relationship of age with measurements and not with changes
in measurements. Nevertheless, our results are largely
consistent with longitudinal findings. Second, with regard to
health status of subjects who were measured and those who
were not measured, differences in the prevalence of disease
were generally higher for the subjects with anthropometric
measures, mainly for myocardial infarction, arrhythmia and
peripheral neuropathy. We do not ascribe this difference to
major illness of participating subjects. Health assessment
was mostly indirect for non-participating subjects, and as a
E. Perissinotto et al.184
consequence, diseases could be underreported. On the other
hand, participating patients, who screened positive for some
diseases, underwent assessment by a specialist, and
diagnoses were more accurately made. Among diseases
related to nutritional status, diabetes had the same
prevalence (13 %) among subjects who were measured
and those who were not measured.
The higher level of disability among those not measured
was evaluated on a small number of subjects (less than 10 %
of the group not measured), who received only a part of the
clinician assessment. We do not consider this prevalence
representative of subjects not measured.
Our population-based sample included both healthy and
unhealthy persons, as they were part of the general
population. Most elderly people have one or more diseases
or disabilities, and completely disease-free subjects are
relatively few. Furthermore, our sample included a relevant
number of subjects from more widely distributed areas than
previous studies on Italian elderly, providing anthropo-
metric and health status data by means of an objective
clinical evaluation.
In conclusion, we provided gender- and age-specific
distributions for many anthropometric measurements for the
elderly that could be used as reference values for the Italian
elderly population to detect individuals at a greater risk of
nutritional disorders. The association found between age
and anthropometric measurements is consistent with the
results of many longitudinal studies. Different anthropo-
metric measurements (BMI, waist:hip ratio, waist circum-
ference) showed a high prevalence of obesity for women,
where the visceral fat increase seems to continue.
Appendix
The ILSA Working Group: M. Baldereschi MD, A. Di Carlo
MD, S. Maggi MD (CNR; Italian National Research
Council, Italy), G. Scarlato MD, L. Candelise MD,
E. Scarpini MD (University of Milano, Italy), F. Grigoletto
ScD, E. Perissinotto ScD, L. Battistin MD, M. Bressan MD,
G. Enzi MD, G. Bortolan ScD (University of Padova, Italy),
C. Loeb, MD (CNR; Italian National Research Council,
Genova, Italy), C. Gandolfo MD (University of Genova,
Italy), N. Canal MD, M. Franceschi, MD (San Raffaele
Institute, Milano, Italy), A. Ghetti MD, R. Vergassola MD
(ULS 10, Firenze, Italy), D. Inzitari, MD (University of
Firenze, Italy), S. Bonaiuto MD, F. Fini MD, A. Vesprini
MD, G. Cruciani MD (INRCA Fermo, Italy), A. Capurso
MD, P. Livrea MD, V. Lepore MD (University of Bari,
Italy), L. Motta MD, G. Carnazzo MD (University of
Catania, Italy), F. Rengo MD (University of Napoli, Italy).
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E. Perissinotto et al.186
    • "It is well known that sex differences affect physical anthropological measurements, such as wrist circumference, arm perimeter, height, waist circumference, and body mass32333435. However, there has not been much research on sexual dimorphism of the upper limb peripheral nervous system. "
    [Show abstract] [Hide abstract] ABSTRACT: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0117930 This study investigated the effects of wrist angle, sex, and handedness on the changes in the median nerve cross-sectional area (MNCSA) and median nerve diameters, namely longitudinal diameter (D1) and vertical diameter (D2). Ultrasound examination was conducted to examine the median nerve at the proximal carpal tunnel in both dominant and nondominant hands of men (n = 27) and women (n = 26). A total of seven wrist angles were examined: neutral; 15°, 30°, and 45° extension; and 15°, 30°, and 45° flexion. Our results indicated sexual dimorphism and bilateral asymmetry of MNCSA, D1 and D2 measurements. MNCSA was significantly reduced when the wrist angle changed from neutral to flexion or extension positions. At flexion positions, D1 was significantly smaller than that at neutral. In contrast, at extension positions, D2 was significantly smaller than that at neutral. In conclusion, this study showed that MNCSA decreased as the wrist angle changed from neutral to flexion or extension positions in both dominant and nondominant hands of both sexes, whereas deformation of the median nerve differed between wrist flexion and extension.
    Full-text · Article · Feb 2015
    • "Its indicators are used to evaluate the health status of a community and even for prognosis of chronic and acute diseases, and to guide medical intervention, if required, in people of all ages. Earlier several investigators all over the world used similar approach in investigating the anthropometric indices and nutritional status of the adults of different ethnic groups1718192021222324. Biochemical markers of bone turnover have been shown to provide valuable information for the diagnosis and monitoring of metabolic bone diseases [25]. "
    Article · Jan 2015 · Journal of Biochemistry
    • "Significantly higher mean values of MAC, TC and LDL were obtained in female students of Rufus Giwa Polytechnic than the results obtained in their male counterparts and also a significantly higher mean value of MAC in females of Achievers University, Owo than the mean value obtained in the males. These findings are consistent with the fact that changes in body composition differ in men and women at different life stages and are reflected in anthropometric and biochemical measures [4]. Related fact to these findings include the following; that in European men and women, fat distribution may be responsible for male/female differences in serum triglycerides but that such conclusions are less clear for HDL-, total-and LDL-cholesterol [15] and that subcutaneous fat deposition in female infants has been found to be significantly increased [16]. "
    [Show abstract] [Hide abstract] ABSTRACT: Anthropometric indices and lipid profiles are useful markers of malnutrition and could reveal risk of cardiovascular disease. This work aimed at evaluating the anthropometric indices and lipid profiles in students of tertiary institutions. Anthropometric indices and lipid profiles were evaluated in 200 students of tertiary institutions including Achievers University and Rufus Giwa Polytechnic, Owo, Nigeria, aged 18-46 years, comprising 95 males and 105 females recruited for this study. Anthropometric measurements including weight, height, waist and hips circumference were measured. Body mass index and waist: hip ratio were also calculated. Fasting lipid profiles including total cholesterol (TC), low density lipoprotein cholesterol (LDL), high density lipoprotein cholesterol (HDL) and triglycerides (TG) were estimated biochemically by auto chemistry analyzer. The results showed statistically significant higher mean values of mid arm circumference (MAC) and triglycerides (TG) in the university students than the polytechnic students studied (p<0.05). A significant higher mean value of low density lipoprotein (LDL) was obtained in the polytechnic students than in the university students with p<0.05. The results also showed a significantly higher mean value of MAC, TC and LDL in females than their male counterparts (p<0.05). A significantly higher mean value of total triglycerides was, however, obtained in males than in the female students (p<0.05). This work revealed statistical difference in the MAC, plasma TG, LDL and TC based on the category of school and gender. We therefore recommend routine measurement of anthropometric indices and blood lipid levels for early detection of malnutrition to avoid complications such as cardiovascular disease.
    Full-text · Article · Apr 2014
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