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Azusa Fukumoto,
Keiko Asakura,
Kentaro Murakami,
Satoshi Sasaki,
Hitomi Okubo,
Naoko Hirota,
Akiko Notsu,
Hidemi Todoriki,
Ayako Miura, Mitsuru Fukui,
Chigusa Date
[show abstract]
[hide abstract]
ABSTRACT: Background: Information on within- and between-individual variation in energy and nutrient intake is critical for precisely estimating usual dietary intake; however, data from Japanese populations are limited.Methods: We used dietary records to examine within- and between-individual variation by age and sex in the intake of energy and 31 selected nutrients among Japanese adults. We also calculated the group size required to estimate mean intake for a group and number of days required both to rank individuals within a group and to assess an individual's usual intake, all with appropriate arbitrary precision. A group of Japanese women (younger: 30-49 years, n = 58; older: 50-69 years, n = 63) and men (younger: 30-49 years, n = 54; older: 50-76 years, n = 67) completed dietary records for 4 nonconsecutive days in each season (16 days in total).Results: Coefficients of within-individual variation and between-individual variation were generally larger in the younger group than in the older group and in men as compared with women. The group size required to estimate a group's mean intake, and number of days required to assess an individual's usual intake, were generally larger for the younger group and for men. In general, a longer period was required to rank women and older adults.Conclusions: In a group of Japanese adults, coefficients of within-individual variation and between-individual variation, which were used to estimate the group size and number of records required for adequate dietary assessment, differed by age, sex, and nutrient.
Journal of Epidemiology 04/2013; · 1.86 Impact Factor
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shinichi Kikuchi,
Shinichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Kazuo Yonenobu,
Eiji Wada,
Takashi Tanaka,
Yoshio Hirota
[show abstract]
[hide abstract]
ABSTRACT: BackgroundThe project to develop a new Japanese Orthopaedic Association (JOA) score rating system for low back disorders, the JOA Back
Pain Evaluation Questionnaire (JOABPEQ), is currently in progress. Part 1 of the study selected 25 “candidateȝ items for use
on the JOABPEQ. The purpose of this current Part 2 of the study was to verify the reliability of the questionnaire.
MethodsA total of 161 patients with low-back disorders of any type participated in the study. Each patient was interviewed twice
at an interval of 2 weeks using the same questionnaire. The reliability of the questionnaire was evaluated by determining
the extension of the kappa and weighted kappa coefficients.
ResultsBoth kappa and weighted kappa were more than 0.50 for all but one item, which was 0.48. The lower 95% confidence interval
exceeded 0.4 in all but two items, which was 0.39. This implied that the test–retest reliability of JOABPEQ was acceptable
as a measure of outcome.
ConclusionsThe tentative questionnaire of the JOABPEQ with 25 items was confirmed to be reliable enough to describe the quality of life
of patients who suffer low back disorders.
Journal of Orthopaedic Science 04/2012; 12(6):526-532. · 0.84 Impact Factor
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shin-Ichi Kikuchi,
Shin-Ichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Eiji Wada,
Kazuo Yonenobu,
Takashi Tanaka,
Yoshio Hirota
[show abstract]
[hide abstract]
ABSTRACT: BackgroundThe Japanese Orthopaedic Association decided to revise the JOA score for low back pain and to develop a new outcome measure.
In February 2002, the first survey was performed with a preliminary questionnaire consisting of 60 evaluation items. Based
on findings of that survey, 25 items were selected for a draft of the JOA Back Pain Evaluation Questionnaire (JOABPEQ). The
second survey was performed to confirm the reliability of the draft questionnaire. This article further evaluates the validity
of this questionnaire and establishes a measurement scale.
MethodsThe subjects of this study consisted of 355 patients with low back disorders of any type (201 men, 154 women; mean age 50.7
years). Each patient was asked to fill in a self-administered questionnaire. Superficial validity was checked in terms of
the completion rate for filling out the entire questionnaire. Factor analysis was then performed to evaluate the validity
of the questionnaire and establish a measurement scale.
ResultsAs a result of the factor analysis, 25 items were categorized into five factors. The factors were named based on the commonality
of the items: social function, mental health, lumbar function, walking ability, and low back pain. To establish a measurement
scale for each factor, we determined the coefficient for each item so the difference between the maximum factor scores and
minimum factor scores was approximately 100. We adjusted the formula so the maximum for each factor score was 100 and the
minimum was 0.
ConclusionsWe confirmed the validity of the JOA Back Pain Evaluation Questionnaire and est ablished a measurement scale.
Journal of Orthopaedic Science 04/2012; 13(3):173-179. · 0.84 Impact Factor
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shinichi Kikuchi,
Shinichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Kazuo Yonenobu,
Eiji Wada,
Takashi Tanaka,
Yoshio Hirota
[show abstract]
[hide abstract]
ABSTRACT: BackgroundTo establish a patient-oriented outcome measure for cervical myelopathy, a subcommittee of the Japanese Orthopaedic Association
(JOA) developed a new scoring system to evaluate the overall clinical status of patients, which could be completed by patients
themselves. The subcommittee completed three large-scale studies to select and modify questions derived from various preexisting
outcome measures including Short Form-36, and then finalized and validated the questionnaire, which comprised 24 questions.
MethodsThe finalized questionnaire was administered to 369 patients with cervical myelopathy due to disc herniation, spondylosis,
or ossification of posterior longitudinal ligament by randomly selected board-certified spine surgeons. Patients with different
severities of myelopathy were included to insure accuracy and responsiveness of this questionnaire against patients’ different
neurological status.
ResultsData of 236 patients were employed and were subjected to rigorous statistical analyses. There was no question that was difficult
to answer and distribution of answers for each question was not concentrated to one choice, indicating the appropriateness
of all 24 questions. Results of factor analysis suggested that the 24 questions could be divided into five different factors
or functional domains. The factors were defined as follows: factor 1, lower extremity function; factor 2, quality of life;
factor 3, cervical spine function; factor 4, bladder function; and factor 5, upper extremity function. Finally, equations
that would yield scores for the five factors were assembled. The score to be used to represent the degree of patients’ disability
or status in each domain can be calculated by multiplying prefixed numbers of selected answers to questions by preassigned
coefficients. Coefficients were defined to make the minimum score 0 and the maximum score 100.
ConclusionsWe have successfully established a questionnaire that is able to demonstrate the status of patients suffering cervical myelopathy
from five different aspects represented by five intuitive numerical scores. The final issue to be confirmed is the responsiveness
of this questionnaire to changes in patients’ status after various surgical and nonsurgical treatments.
Journal of Orthopaedic Science 04/2012; 13(1):25-31. · 0.84 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: A comprehensive self-administered diet history questionnaire (DHQ: 150-item semi-quantitative questionnaire) and a brief self-administered DHQ (BDHQ: 58-item fixed-portion-type questionnaire) were developed for assessing Japanese diets. We compared the relative validity of nutrient intake derived from DHQ with that from the BDHQ, using semi-weighed 16-day dietary records (DRs) as reference.
Ninety-two Japanese women aged 31 to 69 years and 92 Japanese men aged 32 to 76 years completed a 4-nonconsecutive-day DR, a DHQ, and a BDHQ 4 times each (once per season) in 3 areas of Japan (Osaka, Nagano, and Tottori).
No significant differences were seen in estimates of energy-adjusted intakes of 42 selected nutrients (based on the residual method) between the 16-day DRs and the first DHQ (DHQ1) or between the DR and the first BDHQ (BDHQ1) for 18 (43%) and 14 (33%) nutrients, respectively, among women and for 4 (10%) and 21 (50%) nutrients among men. The median (interquartile range) Pearson correlation coefficients with the DR for energy-adjusted intakes of the 42 nutrients were 0.57 (0.50 to 0.64) for the DHQ1 and 0.54 (0.45 to 0.61) for the BDHQ1 in women; in men, the respective values were 0.50 (0.42 to 0.59) and 0.56 (0.41 to 0.63). Similar results were observed for the means of the 4 DHQs and BDHQs.
The DHQ and BDHQ had satisfactory ranking ability for the energy-adjusted intakes of many nutrients among the present Japanese population, although these instruments were satisfactory in estimating mean values for only a small number of nutrients.
Journal of Epidemiology 03/2012; 22(2):151-9. · 1.86 Impact Factor
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[show abstract]
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ABSTRACT: To evaluate the effect of diet versus exercise intervention on weight reduction.
Participants were randomly divided by gender, age, and living area into four groups: group DE (diet and exercise, n = 16), group D (diet only, n = 15), group E (exercise only, n = 15), and group C (control, n = 16). This study ultimately aimed to help participants reduce their body mass index (BMI) by 7% of baseline value. Subjects were 62 residents (men and women ranging in age from 40 to 69 years) of two residential areas in Nara Prefecture, Japan, who participated in annual health checkups in 2006. BMI of the participants was ≥24 and <28 kg/m² at baseline examination. All participants agreed to undergo a 6-month intervention between January 2007 and September 2007.
In our intention-to-treat analysis, mean change in BMI from baseline to final examination was as follows: group DE mean BMI decreased 6.6%, group D mean BMI decreased 5.3%, group E mean BMI decreased 2.3%, and group C mean BMI decreased 2.2%. The reduction in BMI from baseline to final examination was significant in all groups (DE, p < 0.001; D, p < 0.001; E, p = 0.009; C, p = 0.019). Further, mean abdominal circumference was significantly reduced in all groups. Blood glucose levels were significantly reduced only in group DE (p = 0.047).
Combined intervention with diet and exercise proved to be effective in weight reduction, whereas exercise intervention alone was not found to be effective.
Environmental Health and Preventive Medicine 01/2012; 17(4):332-40.
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[show abstract]
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ABSTRACT: To compare the relative validity of food group intakes derived from a comprehensive self-administered diet history questionnaire (DHQ) and a brief-type DHQ (BDHQ) developed for the assessment of Japanese diets during the previous month using semi-weighed dietary records (DR) as a reference method.
Between November 2002 and September 2003, a 4 d DR (covering four non-consecutive days), a DHQ (150-item semi-quantitative questionnaire) and a BDHQ (fifty-eight-item fixed-portion-type questionnaire) were completed four times (once per season) at 3-month intervals.
Three areas in Japan: Osaka, Nagano and Tottori.
Ninety-two Japanese women aged 31-69 years and ninety-two Japanese men aged 32-76 years.
Median food group intakes were estimated well for approximately half of the food groups. No statistically significant differences were noted between a 16 d DR and the first DHQ (DHQ1) or between the DR and the first BDHQ (BDHQ1) in fifteen (44 %) and fifteen (52 %) food items for women and in fourteen (41 %) and sixteen (55 %) food items for men, respectively, indicating that both questionnaires estimated median values reasonably well. Median Spearman's correlation coefficients with the DR were 0·43 (range: -0·09 to 0·77) for DHQ1 and 0·44 (range: 0·14 to 0·82) for BDHQ1 in women, with respective values of 0·44 (range: 0·08 to 0·87) and 0·48 (range: 0·22 to 0·83) in men, indicating reasonable ranking ability. Similar results were observed for mean values of the four DHQ and BDHQ.
In terms of food intake estimates, both the DHQ and the BDHQ showed reasonable validity.
Public Health Nutrition 04/2011; 14(7):1200-11. · 2.17 Impact Factor
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[show abstract]
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ABSTRACT: A previous study reported the development a 75-item food frequency questionnaire for Japanese children (CFFQ). The first aim was to examine the reproducibility and validity of the CFFQ in order to assess dietary intake among two groups; 3-11 year old children (YC group) and 12-16 year old children (AD group). The second aim was to use the CFFQ and the FFQ for adults (AFFQ), and to determine which was better suited for assessing the intake of children in each group.
A total of the 103 children participated in this study. The interval between the first CFFQ and AFFQ and the second CFFQ and AFFQ was one month. Four weighted dietary records (WDRs) were conducted once a week. Pearson's correlation coefficients between the first and second FFQs were calculated to test the reproducibility of each FFQ. Pearson's correlation coefficients between WDRs and the second FFQ were calculated for the unadjusted value and sex-, age-, and energy-adjusted values to determine the validity of each FFQ.
The final number of subjects participating in the analysis was 89. The median correlation coefficients between the first and second CFFQs and AFFQs were 0.76 and 0.73, respectively. There was some over/underestimation of nutrients in the CFFQ of the YC group and in the AFFQ of the AD group. The medians of the sex-, age-, and energy-adjusted correlation coefficients were not different between the YC and AD groups for each FFQ. The correlation coefficient in sex-, age-, and energy-adjusted value revealed that the largest number of subject with high (0.50 or more) value was obtained by the CFFQ in the YC group.
This study indicated that the CFFQ might be a useful tool for assessing habitual dietary intake of children in the YC group. Although the CFFQ agreed moderately with habitual intake, it was found to underestimate intake in theAD group. However, for the AFFQ, the ability to rank habitual intake was low. Therefore, it is necessary to develop a new FFQ or modify an existing FFQ to accurately assess the habitual diet of children in the AD group.
Nutrition Journal 03/2011; 10:27. · 2.48 Impact Factor
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ABSTRACT: Although dietary pattern approaches derived from dietary assessment questionnaires are widely used, only a few studies in Western countries have reported the validity of this approach. We examined the relative validity of dietary patterns derived from a self-administered diet history questionnaire (DHQ) among Japanese adults.
The DHQ, assessing diet during the preceding month, and 4 d dietary records (DR) were collected in each season over one year. To derive dietary patterns, 145 food items in the DHQ and 1259 in the DR were classified into thirty-three predefined food groups, and entered into a factor analysis.
Three areas in Japan; Osaka (urban), Nagano (rural inland) and Tottori (rural coastal).
A total of ninety-two Japanese women and ninety-two Japanese men aged 31-76 years.
We identified three dietary patterns ('healthy', 'Western' and 'Japanese traditional') in women and two ('healthy' and 'Western') in men, which showed a relatively similar direction and magnitude of factor loadings of food groups across the first and mean of four DHQ (DHQ1 and mDHQ, respectively) and 16 d DR. The Pearson correlation coefficients between DHQ1 and 16 d DR for the healthy, Western and Japanese traditional patterns in women were 0.57, 0.36 and 0.44, and for the healthy and Western patterns in men were 0.62 and 0.56, respectively. When mDHQ was examined, the correlation coefficients improved for women (0.45-0.69).
Dietary patterns derived from the DHQ could be used for epidemiological studies as surrogates of those derived from DR.
Public Health Nutrition 07/2010; 13(7):1080-9. · 2.17 Impact Factor
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Mai Yamada,
Satoshi Sasaki,
Kentaro Murakami,
Yoshiko Takahashi,
Hitomi Okubo,
Naoko Hirota,
Akiko Notsu,
Hidemi Todoriki,
Ayako Miura, Mitsuru Fukui,
Chigusa Date
[show abstract]
[hide abstract]
ABSTRACT: Previous studies in Western populations have linked caffeine intake with health status. While detailed dietary assessment studies in these populations have shown that the main contributors to caffeine intake are coffee and tea, the wide consumption of Japanese and Chinese teas in Japan suggests that sources of intake in Japan may differ from those in Western populations. Among these teas, moreover, caffeine content varies widely among the different forms consumed (brewed, canned or bottled), suggesting the need for detailed dietary assessment in estimating intake in Japanese populations. Here, because a caffeine composition database or data obtained from detailed dietary assessment have not been available, we developed a database for caffeine content in Japanese foods and beverages, and then used it to estimate intake in a Japanese population.
The caffeine food composition database was developed using analytic values from the literature, 16 d weighed diet records were collected, and caffeine intake was estimated from the 16 d weighed diet records.
Four areas in Japan, Osaka (Osaka City), Okinawa (Ginowan City), Nagano (Matsumoto City) and Tottori (Kurayoshi City), between November 2002 and September 2003.
Two hundred and thirty Japanese adults aged 30-69 years.
Mean caffeine intake was 256.2 mg/d for women and 268.3 mg/d for men. The major contributors to intake were Japanese and Chinese teas and coffee (47 % each). Caffeine intake above 400 mg/d, suggested in reviews to possibly have negative health effects, was seen in 11 % of women and 15 % of men.
In this Japanese population, caffeine intake was comparable to the estimated values reported in Western populations.
Public Health Nutrition 05/2010; 13(5):663-72. · 2.17 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: Food frequency questionnaires (FFQ) are used for epidemiological studies. Because of the wide variations in dietary habits within different populations, a FFQ must be developed to suit the specific group. To date, no FFQ has been developed for Japanese children. In this study, we developed a FFQ to assess the regular dietary intake of Japanese children. The FFQ included questions regarding both individual food items and mixed dishes.
Children (3-11 years of age, n = 621) were recruited as subjects. Their parents or guardians completed a weighed dietary record (WDR) for each subject in one day. We defined FOOD to be not only as a single food item but also as a mixed dish. The dieticians conceptually grouped similar FOODs as FOOD types. We used a contribution analysis and a multiple regression analysis to select FOOD types.
We obtained a total of 586 children's dietary data (297 boys and 289 girls). In addition, we obtained 1,043 FOODs. Dieticians grouped into similar FOODs, yielding 275 FOOD types. A total of 115 FOOD types were chosen using a contribution analysis and a multiple regression analysis, then we excluded overlapping items. FOOD types that were eaten by fewer than 15 subjects were excluded; 74 FOOD types remained. We also added liver-based dishes that provided a high amount of retinol. A total of 75 FOOD types were finally determined for the FFQ. The frequency response formats were classified into four type categories: seven, eight, nine and eleven, according to the general intake frequency of each FOOD type. Information on portion size was obtained from the photographs of each listed FOOD type in real scale size, which was the average amount of the children's portion sizes.
Using both a contribution analysis and a multiple regression analysis, we developed a 75-food item questionnaire from the study involving 586 children. The next step will involve the verification of FFQ reproducibility and validity.
Nutrition Journal 04/2010; 9:17. · 2.48 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: Dietary magnesium intake has been associated with a reduced risk of type 2 diabetes in western populations, but the evidence is limited in Asian populations.
We assessed the relationship between dietary magnesium intake and risk of diabetes in a cohort of 17,592 individuals (6480 men and 11,112 women) aged 40-65, free of a history of diabetes or other chronic disease at the time of the baseline lifestyle survey, who completed a 5-year follow-up questionnaire. Dietary magnesium was calculated by using a validated questionnaire, and the incidence of diabetes was defined by self-report of physician diagnosis. Associations between dietary magnesium and diabetes incidence were evaluated using a logistic regression model.
We found 459 self-reported new cases of diabetes (237 men and 222 women) at the 5-year follow-up. Dietary intake of magnesium was inversely associated with age- and body mass index (BMI)-adjusted diabetes incidence in both sexes. In multivariable analysis that adjusted further for cardiovascular risk factors, the association was weakened in both sexes, but the association in total participants remained statistically significant. The odds ratios of diabetes with reference to the lowest quartile of magnesium intake were 0.83 (95% confidence interval [CI], 0.69 to 1.09) for the second quartile, 0.79 (95% CI, 0.59 to 1.07) for the third quartile, and 0.64 (95% CI, 0.44 to 0.94) for the highest quartile of magnesium intake (p for trend = 0.04).
Dietary intake of magnesium was associated with a reduced risk of type 2 diabetes in Japanese populations.
Journal of the American College of Nutrition 04/2010; 29(2):99-106. · 2.29 Impact Factor
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Mai Yamada,
Satoshi Sasaki,
Kentaro Murakami,
Yoshiko Takahashi,
Hitomi Okubo,
Naoko Hirota,
Akiko Notsu,
Hidemi Todoriki,
Ayako Miura, Mitsuru Fukui,
Chigusa Date
[show abstract]
[hide abstract]
ABSTRACT: The Standard Tables of Food Composition in Japan do not include information on trans fatty acids. Previous studies estimating trans fatty acid intake among Japanese have limitations regarding the databases utilized and diet assessment methodologies. We developed a comprehensive database of trans fatty acid food composition, and used this database to estimate intake among a Japanese population.
The database was developed using analytic values from the literature and nutrient analysis software encompassing foods in the US, as well as values estimated from recipes or nutrient compositions. We collected 16-day diet records from 225 adults aged 30 to 69 years living in 4 areas of Japan. Trans fatty acid intake was estimated based on the database and the 16-day diet records.
Mean total fat and trans fatty acid intake was 56.9 g/day (27.7% total energy) and 1.7 g/day (0.8% total energy), respectively, for women and 66.8 g/day (25.5% total energy) and 1.7 g/day (0.7% total energy) for men. Trans fatty acid intake accounted for greater than 1% of total energy intake, which is the maximum recommended according to the World Health Organization, in 24.4% of women and 5.7% of men, and was particularly high among women living in urban areas and those aged 30-49 years. The largest contributors to trans fatty acid intake were confectionaries in women and fats and oils in men.
Although mean trans fatty acid intake was below the maximum recommended intake of the World Health Organization, intake among subgroups was of concern. Further public health efforts to reduce trans fatty acid intake should be encouraged.
Journal of Epidemiology 01/2010; 20(2):119-27. · 1.86 Impact Factor
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[hide abstract]
ABSTRACT: The purpose of this study was to examine body composition, blood biochemical markers, and dietary intake in 2 groups of young women engaged in different physical activities and to assess the impact of sedentary lifestyle on risk factors for diabetes and cardiovascular disease.
The subjects were 208 students of a women's university. Of these, 108 majored in nutrition (physically sedentary group, SG) and 100 majored in sports (physically active group, AG). We conducted a survey from mid-June to mid-July in 2004, during which physical examinations, including measurements of body weight and height, evaluation of body composition using dual energy X-ray absorptiometry (DXA), determination of the ankle brachial index (ABI) by measuring the brachial and ankle systolic and assessment of diastolic blood pressure, blood biochemical tests, and examination of 7-day weighted diet records (DRs) were all conducted. The physical and blood biochemical values and the food and nutrient intakes calculated from the DRs were then compared between the groups.
We analyzed a total 133 subjects who had completed all the DRs (78 SG subjects and 55 AG subjects). A comparison between the 2 groups revealed mean body mass indices (BMIs) of 20.5 and 21.4 kg/m2 and mean body fat percentages of 29.4% and 22.6% in the SG and AG subjects, respectively. Even though the SG subjects had lower BMIs, they had significantly higher body fat percentages. The ankle systolic blood pressure and ABI were significantly higher in the AG subjects. With regard to blood biochemistry, the HOMA-beta, leptin, and apoprotein-B levels were significantly higher in the SG subjects. The mean energy intakes (kcal/day) of the SG and AG subjects was 1550 and 1853, respectively. The intakes of most nutrients were significantly higher in the AG subjects, and the amount of food consumed by the SG subjects was low.
The levels of blood biochemical markers such as leptin and apoprotein-B were higher and the ABI was lower in the SG subjects than in the AG subjects. We think that these results are attributable to the accumulation of body fat, including visceral fat. Therefore, it is important for SG subjects to increase their energy expenditure by regular exercise and consume a diet that corresponds to their dietary requirements.
[Nippon kōshū eisei zasshi] Japanese journal of public health 12/2009; 56(12):839-48.
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shinichi Kikuchi,
Shinichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Kazuo Yonenobu,
Eiji Wada,
Takashi Tanaka,
Yoshio Hirota
Journal of Orthopaedic Science 06/2009; 14(3):348-65. · 0.84 Impact Factor
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[hide abstract]
ABSTRACT: The objective of our study was to test the hypothesis that fish or omega-3 polyunsaturated fatty acids (PUFA) intakes would be inversely associated with risks of mortality from ischemic heart disease, cardiac arrest, heart failure, stroke, and total cardiovascular disease.
Data on associations of dietary intake of fish and of omega-3 PUFA with risk of cardiovascular disease among Asian societies have been limited.
We conducted a prospective study consisting of 57,972 Japanese men and women. Dietary intakes of fish and omega-3 PUFA were determined by food frequency questionnaire, and participants were followed up for 12.7 years. Hazard ratios and 95% confidence intervals were calculated according to quintiles of fish or omega-3 PUFA intake.
We observed generally inverse associations of fish and omega-3 PUFA intakes with risks of mortality from heart failure (multivariable hazard ratio [95% confidence interval] for highest versus lowest quintiles = 0.76 [0.53 to 1.09] for fish and 0.58 [0.36 to 0.93] for omega-3 PUFA). Associations with ischemic heart disease or myocardial infarction were relatively weak and not statistically significant after adjustment for potential risk factors. Neither fish nor omega-3 PUFA dietary intake was associated with mortality from total stroke, its subtypes, or cardiac arrest. For mortality from total cardiovascular disease, intakes of fish and omega-3 PUFA were associated with 18% to 19% lower risk.
We found an inverse association between fish and omega-3 PUFA dietary intakes and cardiovascular mortality, especially for heart failure, suggesting a protective effect of fish intake on cardiovascular diseases.
Journal of the American College of Cardiology 10/2008; 52(12):988-96. · 14.16 Impact Factor
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shin-ichi Kikuchi,
Shin-ichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Eiji Wada,
Kazuo Yonenobu,
Takashi Tanaka,
Yoshio Hirota
[show abstract]
[hide abstract]
ABSTRACT: The Japanese Orthopaedic Association decided to revise the JOA score for low back pain and to develop a new outcome measure. In February 2002, the first survey was performed with a preliminary questionnaire consisting of 60 evaluation items. Based on findings of that survey, 25 items were selected for a draft of the JOA Back Pain Evaluation Questionnaire (JOABPEQ). The second survey was performed to confirm the reliability of the draft questionnaire. This article further evaluates the validity of this questionnaire and establishes a measurement scale.
The subjects of this study consisted of 355 patients with low back disorders of any type (201 men, 154 women; mean age 50.7 years). Each patient was asked to fill in a self-administered questionnaire. Superficial validity was checked in terms of the completion rate for filling out the entire questionnaire. Factor analysis was then performed to evaluate the validity of the questionnaire and establish a measurement scale.
As a result of the factor analysis, 25 items were categorized into five factors. The factors were named based on the commonality of the items: social function, mental health, lumbar function, walking ability, and low back pain. To establish a measurement scale for each factor, we determined the coefficient for each item so the difference between the maximum factor scores and minimum factor scores was approximately 100. We adjusted the formula so the maximum for each factor score was 100 and the minimum was 0.
We confirmed the validity of the JOA Back Pain Evaluation Questionnaire and established a measurement scale.
Journal of Orthopaedic Science 06/2008; 13(3):173-9. · 0.84 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: Although many epidemiological studies have examined the association of dietary glycaemic index (GI) and glycaemic load (GL) with health outcomes, information on the reproducibility and relative validity of these variables estimated from dietary questionnaires is extremely limited. We examined the reproducibility and relative validity of dietary GI and GL assessed with a self-administered diet-history questionnaire (DHQ) in adult Japanese. A total of ninety-two Japanese women and ninety-two Japanese men aged 31-76 years completed the DHQ (assessing diet during the preceding month) and 4 d dietary records (DR) in each season over a 1-year period (DHQ1-4 and DR1-4, respectively) and the DHQ at 1 year after completing DHQ1 (DHQ5). We used intraclass correlations between DHQ1 and DHQ5 to assess reproducibility, and Pearson correlations between the mean of DR1-4 and mean of DHQ1-4 and between the mean of DR1-4 and DHQ1 to assess relative validity. Reproducibility correlations for dietary GI and GL were 0.57 and 0.69 among women and 0.65 and 0.58 among men, respectively. Validity correlations for dietary GI and GL assessed by DHQ1-4 were 0.72 and 0.66 among women and 0.65 and 0.71 among men, respectively. Corresponding correlations for DHQ1 were 0.53 and 0.58 among women and 0.57 and 0.60 among men, respectively. White rice was the major contributor to GI and GL in both methods (49-64 %). These data indicate reasonable reproducibility and relative validity of dietary GI and GL assessed by a DHQ for Japanese adults, whose dietary GI and GL are primarily determined by the GI of white rice.
British Journal Of Nutrition 04/2008; 99(3):639-48. · 3.01 Impact Factor
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shinichi Kikuchi,
Shinichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Kazuo Yonenobu,
Eiji Wada,
Takashi Tanaka,
Yoshio Hirota
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ABSTRACT: To establish a patient-oriented outcome measure for cervical myelopathy, a subcommittee of the Japanese Orthopaedic Association (JOA) developed a new scoring system to evaluate the overall clinical status of patients, which could be completed by patients themselves. The subcommittee completed three large-scale studies to select and modify questions derived from various preexisting outcome measures including Short Form-36, and then finalized and validated the questionnaire, which comprised 24 questions.
The finalized questionnaire was administered to 369 patients with cervical myelopathy due to disc herniation, spondylosis, or ossification of posterior longitudinal ligament by randomly selected board-certified spine surgeons. Patients with different severities of myelopathy were included to insure accuracy and responsiveness of this questionnaire against patients' different neurological status.
Data of 236 patients were employed and were subjected to rigorous statistical analyses. There was no question that was difficult to answer and distribution of answers for each question was not concentrated to one choice, indicating the appropriateness of all 24 questions. Results of factor analysis suggested that the 24 questions could be divided into five different factors or functional domains. The factors were defined as follows: factor 1, lower extremity function; factor 2, quality of life; factor 3, cervical spine function; factor 4, bladder function; and factor 5, upper extremity function. Finally, equations that would yield scores for the five factors were assembled. The score to be used to represent the degree of patients' disability or status in each domain can be calculated by multiplying prefixed numbers of selected answers to questions by preassigned coefficients. Coefficients were defined to make the minimum score 0 and the maximum score 100.
We have successfully established a questionnaire that is able to demonstrate the status of patients suffering cervical myelopathy from five different aspects represented by five intuitive numerical scores. The final issue to be confirmed is the responsiveness of this questionnaire to changes in patients' status after various surgical and nonsurgical treatments.
Journal of Orthopaedic Science 02/2008; 13(1):25-31. · 0.84 Impact Factor
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Mitsuru Fukui,
Kazuhiro Chiba,
Mamoru Kawakami,
Shinichi Kikuchi,
Shinichi Konno,
Masabumi Miyamoto,
Atsushi Seichi,
Tadashi Shimamura,
Osamu Shirado,
Toshihiko Taguchi,
Kazuhisa Takahashi,
Katsushi Takeshita,
Toshikazu Tani,
Yoshiaki Toyama,
Kazuo Yonenobu,
Eiji Wada,
Takashi Tanaka,
Yoshio Hirota
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ABSTRACT: The project to develop a new Japanese Orthopaedic Association (JOA) score rating system for low back disorders, the JOA Back Pain Evaluation Questionnaire (JOABPEQ), is currently in progress. Part 1 of the study selected 25 "candidate" items for use on the JOABPEQ. The purpose of this current Part 2 of the study was to verify the reliability of the questionnaire.
A total of 161 patients with low-back disorders of any type participated in the study. Each patient was interviewed twice at an interval of 2 weeks using the same questionnaire. The reliability of the questionnaire was evaluated by determining the extension of the kappa and weighted kappa coefficients.
Both kappa and weighted kappa were more than 0.50 for all but one item, which was 0.48. The lower 95% confidence interval exceeded 0.4 in all but two items, which was 0.39. This implied that the test-retest reliability of JOABPEQ was acceptable as a measure of outcome.
The tentative questionnaire of the JOABPEQ with 25 items was confirmed to be reliable enough to describe the quality of life of patients who suffer low back disorders.
Journal of Orthopaedic Science 12/2007; 12(6):526-32. · 0.84 Impact Factor
