Eat Weight Disord DOI 10.1007/s40519-015-0184-1
ORIGINAL ARTICLE
Body image perception and its association with body mass index and nutrient intakes among female college students aged 18–35 years from Tabriz, Iran Beitullah Alipour • Mahdieh Abbasalizad Farhangi Parvin Dehghan • Mahdieh Alipour
•
Received: 16 January 2015 / Accepted: 5 February 2015 Ó Springer International Publishing Switzerland 2015
Abstract Purpose Recent studies have shown that body image perception is an important factor in weight management and can be influenced by several social or cultural factors in Western or non-Western societies; however, body image perception and its nutritional and demographic determinants in Iran have not been extensively studied. In the current study, we aimed to evaluate body image perception and its socio-demographic and nutritional determinants among female university students in Tabriz City of Iran. Methods In the current cross-sectional survey, 184 female students aged 18–35 years from Tabriz, Iran, were enrolled. Anthropometric variables including weight, height, waist and hip circumference were measured and body mass index (BMI) and waist to hip ratio (WHR) were calculated. Body image perception and distortion were assessed by Figure Rating Scale (FRS) developed by Stunkard consisting of nine silhouettes. Nutrition intake was assessed by a 3-day 24-h dietary recall method and analyzed by Nutritionist IV software. Results Most of the participants in the underweight (41.66 %), normal weight (67.71 %) and overweight (57.14 %) categories of BMI selected the thinnest figure as
their desirable or ideal body image perception. The total prevalences of body image dissatisfaction and distortion were 51.63 % and 64.13 %, respectively. Subjects who had undistorted body image perception consumed more time for physical activity and had more night sleeping hours compared with others (P \ 0.05). Subjects who perceived themselves as being of normal weight had significantly lower intake of total fat and saturated fatty acids and higher intakes of monounsaturated fatty acids (MUFAs) compared with other groups (P \ 0.05). Conclusions According to our findings, female participants had a higher tendency to consider thinness as the preferred body image style. Persons with undistorted body image perception had healthy nutritional status compared with others. Due to high prevalence of body image dissatisfaction, the need for appropriate interventional programs to prevent the associated co-morbidities is emphasized. Keywords Body image Body mass index Dietary intake Thinness
Introduction B. Alipour M. Abbasalizad Farhangi (&) Department of Community Nutrition, Faculty of Nutrition, Tabriz University of Medical Sciences, Tabriz, Iran e-mail:
[email protected] P. Dehghan Department of Food Science and Technology, Faculty of Nutrition, Tabriz University of Medical Sciences, Tabriz, Iran M. Alipour Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
Body image has been defined as ‘‘a person’s perceptions, thoughts and feelings about his or her body’’ by Grogan [1] and there is an increasing focus on it in developed and developing societies. Body image perceptions depend to numerous factors including socio-cultural influences, psychological factors and demographic characteristics [2]. Biological variables including age, race and ethnicity, gender, anthropometric variables and mass media can all influence body image perceptions [3, 4]. Body image dissatisfaction and distortion defined, respectively, as being
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dissatisfied with current body shape and having an unrealistic view of how someone sees his or her body [1] are negatively associated with happiness in life [5]. Body image dissatisfaction is an important risk factor for eating disorders, low self-esteem and depressive disorders such as chronic dysphoria [6, 7]. Considering these co-morbidities of body image dissatisfaction and distortion, it is important to assess and reduce the risk of these problems in the society. Numerous evidences suggest that women suffer more than men from body image dissatisfaction regardless of their age and this discontentment negatively impacts their life [8]. Women are more likely than men to describe themselves as fat, to weigh themselves often and to diet more frequently than men [9, 10]. Although it is generally believed that body image dissatisfaction and their co-morbidities are a Westernized society problem, it is obviously clear that this phenomenon is also increasing toward other cultures and diverse communities [11]. In Western societies, thinness is associated with self-control, elegance and youthfulness and women of higher socioeconomic groups are less likely to be obese [12]. Several studies in developing countries have also reported higher desire to be thin across different sociocultural environments [12–14], while several others have identified results in different directions and being overweight but not obese was the desirable body weight perception [15]. Urbanization and exposure to media have extreme effects on body image perceptions in developing countries. In Iran, previous studies evaluated the relationship between body image perceptions and its socio-demographic determinants; Omidvar et al. [16] found higher prevalence of body image dissatisfaction among female adolescents in Tehran. Another study by Novin et al. [17] among university personnel reported a negative relation between body image satisfaction and body mass index. Although several studies have been carried out in this field, it is important to proceed further in this direction to better understand the many facets of the concepts of body image and its perception. Particularly, it is necessary to evaluate body image dissatisfaction in relation to nutrient intake and energy consumption for better presentation of this problem. Previous observations have suggested the effects of body image perceptions on food intake and nutritional behaviors; Neumark-Sztainer et al. [18] found that a lower body image satisfaction was related to lower intake of fruits and vegetables. In another report by Harper et al. [19], female college students with satisfied body size perceptions were more likely to have healthy dietary choices and higher physical activity. Change in lifestyle and having more physical activity had been associated with improvements in body image satisfaction during obesity treatment programs in women [20]. Several reports have also suggested the possible role of marital status on body image perceptions;
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Manos reported that married women had a more positive body image than non-married women [21]. Our review of literature found no report evaluating the body image perception and its association with nutrient intakes or socio-demographic factors in Iran. Therefore in the current study, we aimed to evaluate body image perception and its social, demographic and nutritional determinants among female university students in Tabriz.
Methods Participants A cross-sectional survey was conducted on 184 female volunteer students aged 18–35 years from Tabriz University of Medical Sciences from April to July 2014. Sociodemographic data were gathered using a questionnaire including information about age, educational attainment, parents’ educational level, marital status and family size. The subjects were also asked about how much time they spend for exercise per week. They also reported the total hours of sleeping during night and day. Subjects were screened for having eating disorders including anorexia nervosa and bulimia nervosa according to Diagnostic and Statistics Manual of Mental Disorders, 4th edition-text revision (DSM-IV-TR) criteria prior participation in the study and patients with eating disorders were excluded [22]. Anthropometric assessments Anthropometric measurements were taken by trained technicians according to standard procedures; weight was measured to nearest 0.1 kg with a high-precision mechanical scale and height was recorded to the nearest 0.1 cm with a stadiometer. Body mass index (BMI) was calculated as weight (kg) divided by height squared (m). Waist circumference (WC) was measured in horizontal plane in centimeters, midway between the lowest rib and the iliac crest with a measuring tape. Waist to hip ratio (WHR) was calculated from waist circumference divided by hip circumference. Participants were divided as underweight, normal weight, overweight and obese when their BMI were \18.5, 18.5–24.9, 25–29.9 and C30 kg/m2 [23]. Body image perceptions Body image perception was assessed by Figure Rating Scale (FRS) developed by Stunkard et al. [24]. Figure Rating Scale consisted of nine silhouettes presenting body shape image ranging from 1 to 9 where 1 is the thinnest body type and 9 the largest, most obese type (Fig. 1). Subjects were asked to mark the figure they resemble
Eat Weight Disord Fig. 1 Body image figures (Stunkard et al. [24]). This figure was copyrighted by Albert Stunkard (reproduced with kind permission). The body image figures have been ordered by size and assigned values of 1 through 9
(perceived body size) and then the figure they would want to look like (ideal body size). Body size satisfaction was examined through the difference between perceived and ideal body sizes. Scores of zero indicate body size satisfaction and negative or positive scores indicate body image dissatisfaction, while negative scores indicate desire to gain weight and positive scores indicate desire to lose weight. Body image distortion was also examined through the difference between perceived body image and actual body size based on BMI categories. Scores of zero indicate body image undistortion, while negative or positive scores indicate body image distortion. The numbers on the scale of body image perceptions (perceived or ideal) were also classified according to standard procedure [25, 26] into four groups: 1 and 2 underweight; 3 and 4 normal weight; 5–7 overweight; and 8 and 9 obese shape.
Table 1 Characteristics of participants (n = 184) Variable
Mean ± SD
Age
22.16 ± 2.19
Weight (kg)
59.72 ± 10.07
Height (cm)
164.15 ± 6.07
Body mass index (kg/m2)
22.19 ± 3.40
Waist circumference (cm)
74.24 ± 14.01
Hip circumference (cm)
94.53 ± 11.1
Waist to hip ratio
0.79 ± 0.099
Educational attainment [n (%)] Associate degrees
17 (9.24)
Bachelor of sciences
157 (85.32)
Master of sciences Doctor of philosophy
3 (1.63) 7 (3.80)
Father’s education [n (%)] C12 years
124 (65.26)
\12 years
60 (32.60)
Mother’s education [n (%)]
Dietary information Dietary information was assessed by a 3-day 24-h dietary recall method. Dietary intake of energy, macronutrients and micronutrients was analyzed by Nutritionist IV software. Statistical analysis Data were analyzed using Statistical Package for Social Science (SPSS) version 18. Data were presented as mean ± SD or number and percentages. The comparison of continuous variables including age, night and day sleeping hours and physical activity level among two independent groups was performed by Student’s t test. Comparison of dietary intakes between different classifications of perceived body image was conducted by oneway ANOVA using Tukey’s post hoc analysis for betweengroup comparisons. Pearson’s Chi-square test was used to compare educational attainment or marital status between different groups of body size satisfaction or to compare body mass index categories in different perceived body image groups. P values less than 0.05 were considered as significant.
C12 years
144 (78.26)
\12 years
40 (21.73)
Family size
4.39 ± 1.27
Marital status Married Single
38 (20.65) 146 (79.34)
Physical activity (min/week)
146.84 ± 106.67
Night sleeping hours (mean ± SD)
7.63 ± 1.34
Day sleeping hours (mean ± SD)
1.00 ± 1.18
Continuous variables are presented as mean ± SD and discrete variables as number and percent
Results The total sample of 184 female university students of mean age 22.16 ± 2.19 years were recruited in the current study. Most of the students were from Bachelor of Science (BS) degree (&85 %) and their mean BMI was 22.19 ± 3.40 kg/m2 (Table 1). Table 2 presents the distribution of participants by perception of body image classification; 35.86 % of the total participants had correct body image perception according to BMI classifications.
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Eat Weight Disord Table 2 Distribution of participants by perception of body image classification BMI (kg/m2)
Perceived body image Under weight (Fig. 1(1, 2))
B18.5 (n = 24)
23 (95.83 %)
18.5–24.9 (n = 127)
74 (58.26 %)
25–29.9 (n = 28) C30 (n = 5)
Normal weight (Fig. 1(3, 4)) 1 (4.16 %)
Over weight (Fig. 1(5–7))
Obese (Fig. 1(8, 9))
0
0
28 (22.04)
19 (14.96 %)
6 (4.72 %)
2 (7.14 %)
7 (25 %)
15 (53.57 %)
4 (14.28 %)
0
2 (40 %)
3 (60 %)
0
Overweight (Fig. 1(5–7))
Obese (Fig. 1(8, 9))
2
BMI body mass index (v statistics = 58.23, P \ 0.001)
Table 3 Ideal body size among participants according to body mass index BMI (kg/m2)
Ideal body size Under weight (Fig. 1(1, 2))
Normal weight (Fig. 1(3, 4))
B18.5 (n = 24)
10 (41.66 %)
9 (37.5 %)
5 (20.83 %)
0
18.5–24.9 (n = 127)
86 (67.71 %)
27 (21.25 %)
12 (9.44 %)
2 (1.57 %)
25–29.9 (n = 28)
16 (57.14 %)
9 (32.14 %)
3 (10.71 %)
0
4 (80 %)
0
0
C30 (n = 5)
1 (20 %) 2
BMI body mass index (P value form v was non-significant)
Most of the participants in underweight (41.66 %), normal weight (67.71 %) and overweight (57.14 %) categories of BMI selected the thinnest Fig. 1(2) as their desirable or ideal body image perception (Table 3). The total prevalence of body image dissatisfaction was 51.63 %, while approximately 28.73 % of them obtained positive scores (had desire to be thinner). The comparisons of demographic characteristics in different groups of body image distortion and body image satisfaction are shown in Tables 4 and 5, respectively. Subjects who had undistorted body image perceptions expended more time on physical activity and had more night sleeping and less day sleeping hours compared with subjects who had distorted body image perceptions (Table 4; P \ 0.05). Similar comparisons were also performed between different groups of body image satisfaction, although no significant difference was achieved (Table 5). Mean energy and nutrient intakes according to classifications of perceived body image are shown in Table 6. Subjects who perceived themselves as being of normal weight had significantly lower intake of total fat and saturated fatty acids and higher intakes of monounsaturated fatty acids compared with other groups (P \ 0.05). Mean energy and carbohydrate intake in persons with normal weight perceived body image perception were non-significantly lower than in other groups (P [ 0.05).
Discussion The current study determined perceived and ideal body image perceptions in relation to body mass index and
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nutritional status among female university students in Tabriz, Iran. According to the review of literature, the university population is regarded as a convenient sample for the study of health in young adults [27]. The comparisons between ideal figure and perceived figure in females showed that thinness was the most desirable body image among female participants. The total prevalences of underweight and overweight or obesity in this sample were 13.04 and 17.93 %, respectively. In Western societies, thinness is desirable and women of higher socioeconomic groups are less likely to be obese [12]. Zaccagni et al. [28] reported a higher desire for thinness among university students in Italy; 81 % of these students would like to be thinner and the prevalence of body image dissatisfaction was 87 %. Similar findings were also reported among US college students [29]. However, the concern about body image conceptions in developing countries has changed in recent years. Previous concerns about body image in developing countries admired obesity and obesity was a symbol of social success and wealth in countries where economic resources were scarce [30–32]; however, exposure to mass media and diverse socio-cultural pressures in developing countries have caused an increased awareness of considering the Western ‘‘thin’’ as ideal and contributed to body image distortion [33]. In our study, the prevalences of body image dissatisfaction and distortion were 51.63 and 64.13 %, respectively. Of the subjects who were dissatisfied with their body image, 28.73 % desired to be thinner. Of the total participants, 53.8 % selected the thinnest figure as their desirable or ideal body image perception. Other studies in developing countries reported higher prevalence
Eat Weight Disord Table 4 Distribution of several demographic characteristics according to body image distortion
Table 5 Comparison of several demographic characteristics according to body image satisfaction
Undistorted body image (n = 66)
Distorted body image (n = 118)
P value
Variable
C25
62 (93.93)
115 (97.45)
0.44
Age (years)
B26
4 (6.06)
3 (2.54)
Variable
Satisfied with body image (n = 89)
Dissatisfied with body image (n = 95)
P value
0.37
Age (years) C25
83 (93.25)
94 (98.94)
B26
6 (6.74)
1(1.05)
Educational attainment [n (%)] 0.45
Educational attainment [n (%)]
Associate degrees
8 (12.12)
9 (7.62)
Bachelor of sciences Master of sciences
54 (81.81)
103 (87.28)
Associate degrees
4 (4.49)
13 (13.68)
77 (86.51)
80 (84.21)
1(1.51)
2 (1.69)
Bachelor of sciences
Doctor of philosophy
3 (4.54)
4 (3.38)
Master of sciences
2 (2.24)
1 (1.05)
Doctor of philosophy
6 (6.74)
1 (1.05)
0.14
Marital status [n (%)] Married Single
13 (19.69)
25 (21.18)
53 (80.30)
93 (78.81)
Physical activity (min/week; mean ± SD)
195.12 ± 61.32
133.05 ± 77.33
Night sleeping hours (mean ± SD)
7.94 ± 1.22
7.47 ± 0.79
Day sleeping hours (mean ± SD)
0.78 ± 0.83
1.10 ± 1.30
0.079
Marital status [n (%)] Married 22 (24.71)
0.24
79 (83.15)
141.25 ± 19.53
153.84 ± 32.39
0.73
0.029
Physical activity (min/week; mean ± SD) Night sleeping hours (mean ± SD)
7.48 ± 1.44
7.75 ± 1.25
0.18
0.047
Day sleeping hours (mean ± SD)
0.96 ± 0.10
1.04 ± 0.13
0.66
Continuous variables are presented as mean ± SD and discrete variables as number and percent
P values from independent sample t test for continuous variables and v2 test for discrete variables
of body image dissatisfaction; for example Latha [34] reported 86 % desire for thinness among female college students in India. Another study in UAE by Thomas [35] reported 74.8 % body image dissatisfaction among female university students, while thinness was the most desirable body image preference. In our study, the prevalence of body image dissatisfaction among married and single subjects was 42.10 and 54.10 %, respectively, which were comparable with each other and with no significant difference. This finding was in agreement of Freidman’s [36] finding reporting equal prevalence of body image dissatisfaction in single and married couples with a history of eating disorders; they also found no relationship between marital status and body image satisfaction; while low marital satisfaction was significantly associated with greater body image dissatisfaction (r = -0.32, P \ 0.0001). We did not evaluate marital satisfaction in the current study. In our study, subjects who had undistorted body image perceptions and were satisfied with their body image had higher rate of exercise and higher amount of night sleeping hours compared with subjects who had distorted body
Single
16 (16.84)
67 (75.28)
0.35
Continuous variables are presented as mean ± SD and discrete variables as number and percent P values from independent sample t test for continuous variables and v2 test for discrete variables
image perception and were unsatisfied with their body image. In the study by Farah [37], a negative relationship between physical activity and total body image discrepancy score was observed. These findings are not unexpected, because most of the subjects who were satisfied with their body image perception also had a good quality of life and better lifestyles compared with others. Body image distortion is associated with unhealthy conditions such as depressive syndromes [38]; previous reports found that young girls with body image distortion were more likely to participate in unsafe weight loss programs including extreme weight loss behaviors and frequent dieting [39]. This can be further confirmed by our findings about nutrient intakes; subjects who perceived themselves as being of normal weight also had lower energy, carbohydrate and total and saturated fat intakes and higher amount of MUFA intake compared with other groups. A positive association between healthy dietary habits and normal
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Eat Weight Disord Table 6 Comparison of mean energy and nutrient intakes according to classifications of perceived body image P value
Variable
Under weight (Fig. 1(1, 2))
Normal weight (Fig. 1(3, 4))
Overweight (Fig. 1(5–7))
Obese (Fig. 1(8, 9))
Energy (kcal/d)
1645.12 ± 509.77
1419.90 ± 443.58
1537.88 ± 619.35
1687.37 ± 399.06
0.30
225.34 ± 65.89
201.10 ± 62.99
227.75 ± 96.56
234.41 ± 59.25
0.62
Protein (g/d)
68.22 ± 43.20
60.28 ± 23.39
57.14 ± 19.67
63.67 ± 9.71
0.33
Fat (g/d)
57.23 ± 27.24
44.32 ± 19.54
46.35 ± 25.62
55.92 ± 20.33
0.049à
Carbohydrate (g/d)
PUFA
19.89 ± 5.04
10.65 ± 1.41
11.45 ± 1.84
14.28 ± 2.83
0.41
MUFA
17.48 ± 9.88
36.58 ± 22.89
13.70 ± 9.45
17.11 ± 6.74
0.036à
SFA
17.95 ± 8.54
12.75 ± 5.89
13.62 ± 8.97
16.33 ± 6.03
0.005à
Fiber Cholesterol (mg/d)
14.09 ± 18.60
9.27 ± 3.68
12.96 ± 15.10
11.79 ± 3.61
0.06
221.96 ± 20.81
246.76 ± 34.82
200.77 ± 29.95
275.24 ± 38.38
0.47
PUFA polyunsaturated fatty acids, MUFA monounsaturated fatty acids, SFA saturated fatty acids
P values from one-way ANOVA
à
Significant difference between normal weight group compared with other groups with Turkey’s post hoc analysis
body image perception was also observed in the study of Kargar-Novin et al. [17] and Contento et al. [40]. In conclusion, the participants of the current study chose the thinnest body image as their preferable style. Additionally, persons who perceived themselves as being of normal weight had better nutritional status and sleeping habits compared with others. Exploring these associations could help apply interventional programs to protect these individuals who are at risk of developing health problems. Acknowledgments This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors. Conflict of interest interest.
6.
7.
8.
All authors declare that there is no conflict of
Ethical approval All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent Informed consent was obtained from all individual participants included in the study.
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