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cosmetics
Article
The Impact of Routine Skin Care on the Quality
of Life
Lixia Zhang 1, Aldhel Adique 1, Pradipta Sarkar 1, Vinay Shenai 1, Murali Sampath 2, Ricky Lai 1,
Joanna Qi 3, Macia Wang 3and Miranda A. Farage 2,*
1The Procter and Gamble Company, International Operations SA Singapore Branch, Singapore 138547,
Singapore; zhang.l.27@pg.com (L.Z.); adique.ml@pg.com (A.A.); sarkar.p@pg.com (P.S.);
shenai.v@pg.com (V.S.); lai.rp@pg.com (R.L.)
2The Procter and Gamble Company, Mason, OH 45040, USA; sampath.m@pg.com
3The Procter and Gamble Company, Beijing 101312, China; qi.jo@pg.com (J.Q.); wang.zy.2@pg.com (M.W.)
*Correspondence: farage.m@pg.com
Received: 12 June 2020; Accepted: 21 July 2020; Published: 24 July 2020
Abstract: Importance:
Consumers purchase a wide variety of consumer products and come into
contact with these products on a daily basis. Manufacturers invest deeply in developing new products
or improving existing products, in order to produce a positive impact on the lives of consumers.
Objective:
The goal of this study was to determine the impact of over-the-counter skin care products
on the quality of life (QoL) of female consumers. Design and Measures: A QoL instrument developed
for consumer products (the Farage QoL with an added Skin Care Module) was used to assess the impact
of a 28-day facial skin care regimen using commercially available products formulated to improve
elasticity, firmness and hydration, and to correct age- and sun-related skin color. Responses were
collected prior to study commencement, at completion of the product usage stage, and after a
period of withdrawal of the product with reversion to a basic skin care regimen. Participants: Two
main study groups from Australia included 89 new mothers, i.e., women with children 2 years and
under (mean age
±
SD was 34
±
4.8), and a national representative sample of 91 women (
45 ±12
).
An additional test group from China consisted of 40 younger cosmetic users (
25 ±4.3
). The Skin Care
Module was not included in the instrument for the third group.
Results:
After 28-days of usage,
both test groups in the main study showed significant improvement in three of five items in the
Skin Care Module (improved feelings of empowerment, happiness and self-esteem). Improvements
persisted after 2 weeks of product withdrawal. In the main QoL instrument, the New Mothers group
showed significant improvement in the Well-Being domain, driven by improvements in the Self-Image
and Self Competence subdomains. The National Representative group showed improvements in the
Energy and Vitality domain, driven by improvements in the Personal Pleasure, Physical State and
Routine Activity subdomains. The additional group in the China study showed results similar to the
New Mothers group.
Conclusions and Relevance:
A quality and efficacious skin care regimen can
have a positive impact on the QoL of consumers. Differences in responses of the test groups were
likely related to differences in the mean age and differences in time available to look after themselves.
Keywords: quality of life; farage quality of life; skin care; cosmetics
1. Introduction
Health related quality of life (HRQoL) instruments have become an important part of evaluating
interventions and treatment options in individuals suffering from a wide variety of medical
conditions [
1
]. More recently, this approach has been expanded to evaluate the state of well-being
of caregivers of individuals with serious medical or mental challenges. Examples are caregivers
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Cosmetics 2020,7, 59 2 of 13
for individuals suffering from Parkinson’s disease, patients with cancer, or individuals with
schizophrenia [
2
–
4
]. Quality of life assessments are becoming widely used in dermatological practice [
5
],
with a wide array of instruments developed for various disease states including acne, rosacea, atopic
dermatitis, and vitiligo. Some investigators have used quality of life (QoL) measures to evaluate the
patients’ “willingness to pay”, i.e., the perceived cost/benefit of treatment to the patient [6–8].
Despite the broad use of health related QoL, very few instruments have been developed to
evaluate the impact of consumer products on quality of life. Consumers purchase a wide variety of
products and come into contact with these products on a daily basis. Manufacturers invest deeply in
developing new products or improving existing products in order to produce a positive impact on
the lives of consumers. Developers of consumer products can benefit greatly from QoL instruments
to define product attributes that would be valued by the consumer. However, evaluating the impact
of consumer products on QoL presents a unique challenge. With health related QoL, the subjects in
question are patients whose quality of life is likely lower than average as a result of a particular health
challenge. The goal is to restore these individuals to a normal QoL that is comparable to the general
population, e.g., to move the QoL from “bad to normal”. With consumer products the individuals in
question are already at the QoL of the general population, and the goal is to improve the QoL to a
place above average, e.g., to move the QoL from “normal to better”.
There are a few examples of instruments designed for evaluating the impact on QoL of specific
consumer products. Beresniak and colleagues developed a QoL instrument to evaluate cosmetic
products and physical appearance [
9
]. The final instrument consisted of 43-items in five dimensions, and
was validated in 13 countries among 3231 subjects. Chang and colleagues evaluated the performance of
an over-the-counter skincare regimen in treating chronic xerosis and its impact on the subjects’ quality
of life using an 11-item instrument [
10
]. Clinically, subjects exhibited a demonstrable improvement in
corneometry and D-Squame tape assessments, while perceiving a significant reduction in itchiness,
other xerosis associated symptoms, and emotional impact. The impact on quality of life among women
with hair loss was evaluated by Zhuang and colleagues [
11
]. At the first visit, subjects’ quality of
life was inversely related to their perception of the severity of hair loss via visual assessment scales.
Subjects were re-tested after 12 months of treatment with twice daily applications of 2% minoxidil
average scores for the group improved for both indices.
In another example of application of a QoL instrument developed for consumer products,
Getliffe and colleagues developed QoL measures for absorbent products for incontinence [
12
].
These investigators proposed that results on the relative importance of product characteristics can be
used to provide guidance toward developing products that improve comfort and odor containment,
and better meet the needs of the consumer with regard to discretion and fit.
The Farage Quality of Life (FQoL
™
) instrument was developed to assess the potential impact
of a broader range of consumer products on the quality of life [
13
]. The 27-item self-administered
questionnaire covers a variety of elements pertaining to overall well-being, energy and vitality. In
addition, modules can be added pertinent to specific categories of consumer products. Previously we
published results of this QoL instrument with an added Menstrual Module, to evaluate the impact of
menstrual control products on consumers’ quality of life [
13
,
14
]. Results of a study conducted using
this instrument determined that scores on items relating to well-being, emotional and physical state
were lower during menstruation vs. before menstruation. However, if subjects were given a new,
better performing menstrual pad scores did not worsen during menstruation.
Skin care products represent a large category of consumer products. In 2018, sales of skincare
products in the US grew by 13% to an estimated USD 5.6 billion [
15
]. Recent decades have seen
the emergence of cosmeceuticals, or products that have therapeutic effects capable of affecting
the condition of the skin beyond the duration of application [
16
]. The effectiveness of such skin
care products can be evaluated using a number of measures. Instruments are readily available to
measure improvements in skin elasticity and firmness, increases in hydration, improvements in barrier
function and hyperpigmentation. However, an additional important measure to determine the overall
Cosmetics 2020,7, 59 3 of 13
effectiveness of skin care products is the effect(s) of such products on the self-esteem and quality of life
of the consumer.
The goal of this study was to determine the potential impact of over-the-counter skin care
products on the quality of life of female consumers by evaluating product benefits in addition to
technical benefits. Quality consumer products can contribute to overall well-being, and an increase
in various aspects of QoL during use providing holistic product benefits to meet the overall needs
of our consumers. Participants were asked to use specific skin care products for 28-days. The key
active in the skin care products is niacinamide. This material is known to be effective in improving
skin texture, elasticity, fine lines and wrinkles, red blotchiness, hyperpigmentation, sun damage and
sallowness seen with ageing [
17
,
18
]. Although objective data are not presented in this manuscript,
our own data in the study conducted in China and described below showed significant improvement
in skin hydration, skin barrier function, and skin elasticity after 8 days of product use. Objective
measured conducted 5 days after product was withdrawn, demonstrated continued improvement
over pre-use levels (unpublished data).
Using the FQoL
™
instrument, the impact of the skin care regimen on quality of life was evaluated
before and after completion of the product use, and several days after cessation of product use.
2. Methods
In the main study conducted in Australia, participants were asked to use a basic skin care regimen
for 3 days consisting of a placebo (3% glycerin cream with no actives) as their only skin care product
(washout period). This was followed by a 28-day test period, where participants were asked to use a
skin care regimen twice a day. During this product use phase test products were identified only as
“Facial essence”, “Facial cream”, and “Eye cream”. Brand names were not disclosed, and neither the
testing facility nor the participants were aware of the product identity. After the use phase subjects
returned to the basic skin care regimen using the placebo (product deprivation period). The skin
care regimen in the product use phase consisted of three commercially available products (Olay
®
products, Procter & Gamble, Australia) including a tone-correcting serum (Luminous Tone Perfecting
Treatment), a wrinkle-smoothing cream (Regenerist Micro-Sculpting Cream) and a color-correcting
eye cream (Ultimate eye cream). Participants were asked to complete the FQoL
™
instrument after the
washout period (i.e., baseline), after using the test products for 28 days, and after the 14-day product
deprivation period. Study participants were recruited through a local, independent testing agency.
The study groups consisted of mothers with children 2 years old and under (i.e., New Mothers), and a
National Representative sample (Table 1). Among the New Mothers group, 89 subjects completed the
28-day skin care regimen phase and 83 subjects went on to 42 days to complete the deprivation phase.
Among the National Representative group, 91 subjects completed the 28-day skin care regimen phase
and 90 subjects completed the deprivation phase.
Table 1. Demographics of Study Groups.
Australia Study China Study
New Mothers aNational Rep bYounger Cosmetic Users
Mean Age (±SD) 34 (±4.8) 45 (±12.0) 25 (±4.3)
Age Range 22–50 22–65 20–33
# completing use phase 89 91 40
# completing deprivation phase 83 90 40
a
Mothers with children 2 years old and under.
b
National Representative sample excluding mothers with children
2 years old and under.
The FQoL
™
was modeled initially after the World Health Organization general quality of life
instruments [
19
], using a categorical scale of 1–5. The validated FQoL
™
instrument used in this study
consisted of 27 items, covering overall quality of life (1 item), and two other domains: Well-Being
Cosmetics 2020,7, 59 4 of 13
(12 items) and Energy and Vitality (14 items) [
13
]. The two domains are subdivided into a total of six
subdomains, as shown in Table 2. All items were scored on a 5-point Likert scale, asking responders
their level of agreement with each statement (strongly agree, agree, neither agree nor disagree, disagree,
strongly disagree). Responses were converted into numerical values 1–5, such that the most positive
responses were assigned the higher numbers. In addition to the standard FQoL
™
instrument a
Skin Care Module was included, consisting of 5 additional items specifically targeted toward the
participants’ feelings toward their skin condition (Table 2).
Table 2. Structure of the Farage Quality of Life (FQoL™) Instrument.
Domains Sub-Domains Number of Items Definition
Quality of Life 1 Overall quality of Life
Emotion 5 Reflects a positive outlook on life
Well-Being Self-Image 5 Reflects self-acceptance, self-confidence and physical
appearance
Self-Competence 2 Reflects self-competence
Personal Pleasure 7 Includes the things consumers do for leisure and pleasure.
Energy and Vitality Physical State 4 Involves physical activities, energy, household activities
consumers do.
Routine Activity 3 Involves routine daily things consumers do in their lives.
Skin Care Module 5 Questions on empowerment, self-esteem, confidence,
attractiveness, and happiness with facial skin conditions.
For each test group, the responses at baseline were compared to responses at 28-days after
completion of the product use phase, and at 42-days after 14 days of product deprivation. The change
in the response for each individual item was evaluated for statistical significance using a non-parametric
Wilcoxon signed rank test. The Pratt method was used to address zero values [
20
]. The subdomains
and domains were averages of responses to individual items within that grouping, and means were
evaluated using a t-test. The 2-sided pvalues are reported. All analyses were done using JMP Pro
version 14.2.0–Statistical Discovery Software from SAS.
A similar study was conducted in China using a group of young women recruited through a local,
independent testing agency. (See Table 1for demographic information.) The study was designed to
evaluate a similar unidentified skin care regimen consisting of a cleanser, a clear lotion, an essence
serum, and a moisturizer (Olay
®
Golden Aura products, Procter & Gamble, China). After a 3-day
wash-out period was completed, the products were used under a clinical setting for 28-days. This was
followed by a 5-day product deprivation phase. Previously, a Chinese language version of the FQoL
™
was translated and validated [
21
]. This instrument was administered at baseline, after completion of
the use phase at 28-days, and after the 5-day deprivation phase at 33-days. The Skin Care Module was
not included in the study conducted in China. No correction was made for multiple comparisons, as,
typically, quality of life studies are not confirmatory studies focusing on a small number of end points.
However, we obtained more than statistically significant results in 39 out of a total of 128 statistical
tests (32 questions
×
2 segments
×
2 time points), which is much higher than 5%, as expected by
random chance.
3. Results
In the study conducted in Australia, an additional Skin Care Module was included as a part of
the FQoL
™
instrument (questions shown in Table 2). Figure 1presents results for the two cohorts:
New Mothers (a), and National Representative (b). After the 28-day product usage period both test
groups showed significant improvement over baseline when asked if they felt empowered and happy
with the condition of their skin. In addition, both groups responded more favorably when asked if the
condition of their skin improved their self-esteem. For all three of these questions the improvement
persisted 2 weeks after product usage ceased (day 42).
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The New Mothers group also showed significant improvement at the completion of the 28-day
usage period and the follow up 14 days of deprivation period (day 42) in the level of confidence
without make-up (p-values =0.002 and 0.025, respectively) (Figure 1a). For this question, the National
Representative group (Figure 1b) did not show significant improvement at the either time point.
However, this group showed improvement when asked if the condition of their skin made them feel
more attractive at the 28- and 42-day time point (p=0.003 and 0.001, respectively) (Figure 1b).
Figure 2presents results of the FQoL
™
among the new mothers with children 2 years or younger.
The mean score for the Well-Being domain increased significantly at day 28, after one month of use
of the three-part skin care regimen (p=0.013),and continued to improve after the 2-week product
deprivation period (p=0.002) (Figure 2a). The means for the Overall QoL and for the Energy and
Vitality domain did not improve significantly at either time point. Figure 2b demonstrates that
improvement in the Well-Being domain scores was driven by significant increases in scores for the
Self-Image and Self Competence subdomains. In both subdomains improvement continued through
the product deprivation period (i.e., at the 42-day time point). Within the Energy and Vitality domain
responses in Personal Pleasure improved significantly after the 28 days of product use (p=0.025).
Improvement in Physical State was significant at day 42 after the 2 weeks deprivation period (p=0.051).
In the National Representative cohort, the mean score for Overall QoL or the Well-Being domain
did not increase significantly (Figure 3a). However, responses in the Energy and Vitality domain
showed significant improvement after 4 weeks of the skin care regimen (Day 28, p=0.001) (Figure 3a).
The increase persisted after the 2-week product deprivation period (Day 42, p=0.028). The increase in
the Energy and Vitality domain at 28 days was driven by significant increases in mean scores for all
three subdomains, i.e., Personal Pleasure, Physical State, and Routine Activity (Figure 3b). After the
2-week deprivation period (Day 42) the Physical State mean score was still significantly elevated over
the baseline (p=0.011).
Individual items in the FQoL
™
instrument were also evaluated for significant differences.
The mean changes from baseline for each group at both 28- and 42-days were analyzed (Table 3). In the
New Mothers group, most of the significant improvements were in the Well-Being domain. In the
Self-Image subdomain, feeling good about oneself improved at day 42 (p=0.004), self-confidence shows
significant improvements at both 28-day and 42-day time point (p=0.034 and 0.037, respectively);
and feelings about physical appearance show significant improvements at both 28-day and 42-day time
point (p=0.001 and 0.002, respectively). In the Self-Competence subdomain significant improvement
was noticed at day 42 with feelings about the participants’ ability to take care of themselves showing
improvement at day 42 (p<0.001). The item about feeling confident showed improvement at both 28-
and 42-days (p=0.009 and 0.003, respectively).
In specific items in the FQoL
™
the National Representative group showed significant
improvements in self-confidence within the Self-Image subdomain at both day 28 and day 42 (p=0.034
and 0.043, respectively) and physical appearance at day 42 (p=0.001) (Table 3). However, most of the
improvements in means for individual items of this group were in the Energy and Vitality domain.
Responses indicated improvement in the ability to attend public functions (p=0.033 at day 42), engage
in enjoyable activities (p=0.034 at day 28), and enjoy being with friends and family (p=0.008 and
0.006 at days 28 and 42, respectively). Among the four items in the Physical State subdomain having
more energy showed statistically significant improvement at day 28 (p=0.01) and both feeling less
tired and ability of complete household chores showed statistically significant improvement at day 42
(p=0.018 and 0.022, respectively).
Cosmetics 2020,7, 59 6 of 13
Cosmetics 2020, 7, x FOR PEER REVIEW 8 of 14
Figure 1. In a study of a three-part skin care regimen, participants were asked to fill out a Skin Care Module consisting of five questions that was included as a part of the
FQoL™ instrument. Mean scores for each item were determined at three time points: before study commencement (i.e., baseline), after a 4-week usage period (day 28),
and after 2-weeks of product deprivation (day 42). The 28- and 42-day mean changes from baseline are shown. The change in the response for each individual item was
evaluated for statistical significance using a non-parametric Wilcoxon signed rank test. The 2-tailed p values are reported. (a) New Mothers group, and (b) National
Representative group.
Figure 1.
In a study of a three-part skin care regimen, participants were asked to fill out a Skin Care Module consisting of five questions that was included as a
part of the FQoL
™
instrument. Mean scores for each item were determined at three time points: before study commencement (i.e., baseline), after a 4-week usage
period (day 28), and after 2-weeks of product deprivation (day 42). The 28- and 42-day mean changes from baseline are shown. The change in the response for each
individual item was evaluated for statistical significance using a non-parametric Wilcoxon signed rank test. The 2-tailed pvalues are reported. (
a
) New Mothers group,
and (b) National Representative group.
Cosmetics 2020,7, 59 7 of 13
Cosmetics 2020, 7, x FOR PEER REVIEW 9 of 14
Figure 2. The FQoL™ instrument was administered at three total time points. Mean scores for domains (a) and subdomains (b) were determined at 28- and 42-days
and compared to the baseline means for significant changes using a t test. The 2-tailed p values are reported. In this group, 89 participants completed day 28, and
83 completed day 42. For Overall QoL, the p-values from non-parametric tests are also reported and denoted by p*.
p*= 0.482
p*= 0.021
Figure 2.
The FQoL
™
instrument was administered at three total time points. Mean scores for domains (
a
) and subdomains (
b
) were determined at 28- and 42-days
and compared to the baseline means for significant changes using a ttest. The 2-tailed pvalues are reported. In this group, 89 participants completed day 28,
and 83 completed day 42. For Overall QoL, the p-values from non-parametric tests are also reported and denoted by p*.
Cosmetics 2020,7, 59 8 of 13
Cosmetics 2020, 7, x FOR PEER REVIEW 10 of 14
Figure 3. Mean changes in scores for the domains (a) and subdomains (b) are shown. In this group, 91 participants completed day 28, and 90 completed day 42.
The 2-tailed p-values from t-test are reported. For overall quality of life (QoL), the p-values from non-parametric tests are also reported and denoted by p*.
p* = 0.396 p* = 0.318
Figure 3.
Mean changes in scores for the domains (
a
) and subdomains (
b
) are shown. In this group, 91 participants completed day 28, and 90 completed day 42.
The 2-tailed p-values from t-test are reported. For overall quality of life (QoL), the p-values from non-parametric tests are also reported and denoted by p*.
Cosmetics 2020,7, 59 9 of 13
Table 3. Mean change in responses to individual questions in Australia study.
New Mothers (N =89) National Rep (N =91)
28 Days 42 Days 28 Days 42 Days
Mean
Change p value Mean
Change p value Mean
Change p value Mean
Change p value
Overall Quality of Life 0.056 0.482 0.169 0.021 0.088 0.396 0.111 0.318
Well-being Domain
Emotion Subdomain
Happiness 0.067 0.369 0.108 0.106 0.099 0.421 0.156 0.175
Manage stress level 0.157 0.327 0.145 0.343 −0.022 0.852 −0.045 0.893
Good mood 0 0.65 0.048 0.584 0.121 0.286 0.078 0.477
Positive outlook 0.18 0.053 0.145 0.106 −0.066 0.647 −0.056 0.525
Calm and peaceful 0.067 0.564 0100.809 0.056 0.74
Self-Image Subdomain
Feel good about self 0.101 0.18 0.265 0.004 0.077 0.412 0.033 0.62
Self-confidence 0.135 0.034 0.169 0.037 0.198 0.034 0.167 0.043
Physical appearance 0.303 0.001 0.313 0.002 0.077 0.257 0.278 0.001
Amount of exercise 0.124 0.552 0.145 0.19 0.135 0.145 0.133 0.175
How clothes fit and look 0.135 0.18 0.217 0.084 −0.022 0.82 −0.033 0.82
Self-Competence Subdomain
Ability to take care of self 0.067 0.736 0.41 <0.001 0.066 0.202 0.089 0.218
Feel confident doing things 0.303 0.009 0.386 0.003 0.143 0.172 0.122 0.213
Energy and Vitality Domain
Personal Pleasure Subdomain
Sex life 0.281 0.078 0.289 0.061 −0.024 0.563 −0.06 0.303
Attend public functions 0.247 0.165 0.217 0.292 0.213 0.195 0.333 0.033
Do enjoyable activities 0.045 0.31 0.217 0.051 0.143 0.034 0.067 0.537
Sports/recreation 0.034 0.291 −0.265 0.138 0.164 0.171 −0.081 0.635
Hobbies 0.225 0.07 0.06 0.277 0.153 0.28 0.169 0.247
Enjoy friends/family 0.146 0.084 0.145 0.175 0.244 0.008 0.298 0.006
Enjoy time alone 0.225 0.147 0.145 0.349 0.125 0.34 0.174 0.128
Physical State Subdomain
Feel physically 0.067 0.456 0.217 0.027 0.187 0.064 0.122 0.209
Energy 0 0.605 0.157 0.111 0.286 0.01 0.189 0.184
Felt less tired 0 0.946 0.024 0.526 0.267 0.056 0.303 0.018
Complete household chores 0.225 0.16 0.265 0.099 0.144 0.097 0.258 0.022
Routine Activity Subdomain
Personal hygiene 0.011 0.97 0.072 0.503 0.143 0.036 0.067 0.401
Go to work or to school 0.067 0.419 0.108 0.885 0.119 0.408 0.071 0.662
Go where want/need to go −0.101 0.359 0.036 0.922 0.146 0.049 0.011 0.805
Note: Participants were asked to fill out the FQoL
™
instrument at three time points: before study commencement
(i.e., baseline), after a 4-week usage period (day 28), and after 2 weeks of product deprivation (day 42). The mean
changes from baseline are shown for 28- and 42-day time points. The change in the response for each individual
item was evaluated for statistical significance using a non-parametric Wilcoxon signed rank test. The 2-tailed p
values are reported.
The FQoL
™
instrument was used in a similar study in China among a group of younger cosmetics
users (mean age of 25 years, as shown in Table 1). This group showed significant improvement in the
mean Overall QoL score and in the Well-Being domain score at both time points, i.e., after 28 days
of use and after 5 days of product deprivation (Figure 4a). For the Energy and Vitality domain, the
mean scores at 28- and 33-days were virtually unchanged from the baseline value. The increase in the
Well-Being domain was driven by directional increases in scores for all three subdomains, i.e., Emotion,
Self-Image, and Self Competence (Figure 4b), however, only the means for the Self-Image subdomain
reached significance of p=0.05 or less. The subdomains that make up the Energy and Vitality domain
were not significantly changed from baseline.
Cosmetics 2020,7, 59 10 of 13
Cosmetics 2020, 7, x FOR PEER REVIEW 11 of 14
Figure 4. In a study of three parts, skin care regimen participants were asked to fill out the FQoL™ instrument before and after a 4-week usage period (day 28), and
after 5-days of product deprivation (day 33). Mean scores for domains (a) and subdomains (b) were compared to the baseline means for significant changes. Results
for the 40 participants in the cohort are presented.
Figure 4.
In a study of three parts, skin care regimen participants were asked to fill out the FQoL
™
instrument before and after a 4-week usage period (day 28),
and after 5-days of product deprivation (day 33). Mean scores for domains (
a
) and subdomains (
b
) were compared to the baseline means for significant changes.
Results for the 40 participants in the cohort are presented.
Cosmetics 2020,7, 59 11 of 13
4. Discussion
When comparing the responses of the groups in the Australia study, it must be kept in mind that
these two group were significantly different in two respects. First, the mean ages of these groups are
decidedly different (Table 1). The average age of the New Mothers group was 34 years old, with more
than 90% of the group less than 40 years (data not shown). The National Representative group had an
average age of 45, with more than 75% over 34 years of age. Aging skin looks thinner, paler, and dryer,
and becomes increasingly more prone to show wrinkles and age spots. Correcting these age-related
challenges likely influenced the responses of some individuals in this group. The second substantial
difference in the two groups is that mothers with young children find it difficult to find time for self-care.
New Mothers often feel that their time is filled with care for their children, and their own appearance
is not a priority [
22
]. In the course of this study the skin care regimen provided the opportunity to
spend time on themselves to improve their skin. Additionally, in younger individuals, appearance
may be more an important factor in how they present themselves to the outside world, compared to
women in the older age group, who may view skin care regimen as something they do for themselves.
Overall, there was little difference between the two groups with regards to questions specific
about the condition of their skin in the skin care module (Figure 1). After the product use period both
groups of panelists felt the condition of their skin improved feelings of empowerment, happiness, and
self-esteem (Figure 1a,b). The New Mothers group (Figure 1a) also responded they felt more confident
with less make-up and more attractive, significance in responses was achieved at both 28-day and
42-day time points, respectively. The National Representative group showed significant improvement
at both time points regarding feeling attractive, however, they did not improve significantly in feeling
confident with less make-up. In addition, one individual item in the standard FQoL
™
that asks
specifically about feelings regarding physical appearance, showed significant improvement in both
groups (Table 3). This was significant for the New Mothers group at both the 28-day and 42-day time
point, and for the National Representative group at the 42-day time point.
The differences between responses of these two groups may be a consequence of the age and
responsibilities between the two test groups, and the situation faced by many mothers of young
children. Among New Mothers, the improvement in the Self-Image and Self-Competence subdomains
was driven by changes directed at themselves, such as feeling good about themselves, and feelings
about their physical appearance, feeling confident, and the ability to take care of themselves (Table 3).
In general, new mothers tend to spend less time concerned with their own well-being and following
the skin care regimen during the study may provide a break from routine childcare and an opportunity
to do something that is strictly for themselves. In addition, improvements in the condition of the
skin may be much more noticeable among a group that typically has less time for routine skin care.
In contrast, the improvement in the Personal Pleasure subdomain among the National Representative
group was the result of positive changes in outwardly directed social activities (Table 3). This group
felt better about attending functions, engaging in activities, and enjoying time with friends and family.
For many of the individual items in the FQoL
™
instrument (Table 3) and for the skin care module
(Figure 1) positive changes lasted or increased between day 28 and day 42, i.e., after the skin care
regimen products were withdrawn. This is consistent with the definition of skin care cosmeceuticals
as materials having therapeutic effects beyond the duration of application [
16
]. A separate analysis
was conducted comparing the means for the domains and subdomains at day 42 versus day 28.
Increases between day 42 and day 28 were not significant except for the Self Competence domain for
the New Mothers (Figure 1b) (p=0.021, data not shown).
The smaller study in China represented a younger age group from a very different cultural
environment than the Australia study. The average age in this test group was 25, and the oldest
individual was 33 years of age (Table 1). In addition, mothers of young children were excluded from
this group. The final FQoL
™
instrument was administered after only 5 days of product withdrawal
(on day 33). Unlike both test groups in the Australia study, this group showed a significant improvement
in the mean score for overall QoL at day 33 (Figure 4a). Neither group in the Australia study showed
Cosmetics 2020,7, 59 12 of 13
significant improvement in this item at either time point. The test group in China also showed
significant improvement in the Well-Being domain (Figure 4a), with significant positive changes in the
Self-Image subdomain (Figure 4b, p=0.004 and 0.0008 at 28- and 33-days, respectively). The skin care
module was not included in this study; however, this group exhibited a significant improvement in the
physical appearance item after the 28-day product usage phase (mean improvement in score =0.325,
pvalue =0.031, data not shown).
One limitation of the use of QoL to evaluate the effects of consumer products is the mindset
shift needed in terms of the changes, which will likely be incrementally small. QoL instruments have
been used predominantly to evaluate the impact of chronic disease states, the effectiveness of specific
medications, or the potential positive results from different therapeutic approaches. In these cases,
the patients’ quality of life generally starts lower than the average individual not suffering from similar
maladies, and the QoL attempts to evaluate improvement toward that of the average individual.
We have used the FQoL instrument to evaluate the effects of consumer products on generally healthy
individuals who are not suffering from any specific disease states. In other words, our subjects start at
“average QoL” and we are attempting to measure further increases. As a result, changes in QoL could
be expected to be relatively small. Despite that, we are able to see differences that reached significance.
Investigations have shown that physical attractiveness is an important determinant of interpersonal
relationships, especially in the early stages [
23
]. The use of make-up is widely portrayed as a tool
for improving facial attractiveness. Korichi and colleagues developed a questionnaire to evaluate
the reasons women used make-up [
23
]. Investigations have shown that women use cosmetics for a
variety of reasons ranging from feeling less self-consciousness about their appearance, feeling more
assertive and confident, or appearing healthier [
23
,
24
]. A skin care regimen can have a positive impact
on the QoL of consumers. This study demonstrates that routine skin care with quality products that
are effective in addressing skin concerns also contributes to improving self-esteem, and has positive
effects on several aspects of a person’s self-image. Differences in responses of the test groups were
likely related to differences in the mean age and differences in time available to look after themselves.
Author Contributions:
Set-up & executed the study with a third party agency in Australia: L.Z., A.A. and J.Q. in
China. Design consultant for both studies: M.W. All statistical analysis and critical review of the manuscript:
P.S. Methodology, conceptualization and visualizations: M.A.F. Lead writing, editing, and critical review of
manuscript: M.A.F., A.A., L.Z. Project sponsors: V.S., R.L., M.S. All authors have read and agreed to the published
version of the manuscript.
Funding: This work was funded by The Procter and Gamble Company.
Acknowledgments:
The authors thank Terresa L. Nusair; (Health and Environmental Safety Alliance, Cincinnati,
OH, USA) for technical input.
Conflicts of Interest:
Declare conflicts of interest or state “All authors are employees of the Procter and
Gamble Company”.
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