Trends in thin body stature among Japanese male adolescents, 2003–2012

Inokuchi, Mikako; Matsuo, Nobutake; Takayama, John I.; Hasegawa, Tomonobu

doi:10.3109/03014460.2013.856938

Cited by 13 publications

(11 citation statements)

References 16 publications

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“…The BMI cut-off points were based on averaged data from six different countries, including Asian countries; these cut-off points have been shown to be applicable to Japanese children [ 19 ]. The BMI cut-off points have been used in numerous studies in Japan [ 3 , 4 , 10 , 19 , 20 ]. In the present study, the BMI cut-off points for childhood underweight, overweight, and obesity were 14.35, 19.10, and 22.77 (age 9), and 14.64, 19.84, and 24.00 (age 10), 15.35, 21.22, and 26.02 (age 12) and 15.84, 21.91, and 26.84 (age 13) for boys, and 14.28, 19.07, and 22.81 (age 9), and 14.61, 19.86, and 24.11 (age 10), 15.62, 21.68, and 26.67 (age 12) and 16.26, 22.58, and 27.76 (age 13) for girls, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…In Japan, the prevalence of obese boys and girls increased from 6.1 and 7.1 %, respectively, in the time-period 1976 to 1980, to 11.1 and 10.2 % in 1996 to 2000 [ 2 ]. Moreover, recent studies have reported that the prevalence of thinness among Japanese adolescents boys and girls have progressively increased from 2.8–4.7 and 2.0–5.7 % in 2003–2004, respectively, to 5.1–7.6 and 3.5–7.8 % in 2011–2012 [ 3 , 4 ]. Thinness, overweight and obesity among children and adolescents can lead to adverse health effects [ 5 , 6 ], and should therefore be considered serious public health problems.…”

Section: Introductionmentioning

confidence: 99%

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Association between distorted body image and changes in weight status among normal weight preadolescents in Japan: a population-based cohort study

et al. 2016

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BackgroundDistorted body image may be important risk factors for being underweight and overweight. The objective of this study was to investigate the association between having a distorted body image and being overweight or underweight among normal weight preadolescents in a population-based cohort study in Japan for each sex.MethodsThe study participants were 1431 normal weight fourth-grade students (age range: 9–10 years) in Ina town, Japan from 2002 to 2007. The height and weight of each student were measured while they were in the fourth grade (at baseline) and seventh grade (3 years later). Childhood underweight and overweight were defined using the body mass index cut-off points proposed by the International Obesity Task Force. Information regarding the self-perceived weight status of each student at baseline was collected using a self-administered questionnaire. Children who were normal weight but perceived themselves as heavy or thin were regarded as having a distorted body images. A logistic regression model was used to calculate the odds ratios (ORs) and 95 % confidence interval (95 % CI) for being overweight or underweight 3 years later among those having a distorted body image at baseline.ResultsBoth boys and girls who perceived themselves to be heavy at baseline were at a statistically significantly greater risk of being overweight 3 years later as compared to boys and girls, respectively, who identified as being at a normal weight at baseline (boys: adjusted OR: 4.66, 95 % CI: 1.01–21.48; girls: 3.88, 1.56–9.65). Both boys and girls who perceived oneself to be thin at baseline were at a statistically significantly greater risk of bring underweight 3 years later as compared to boys and girls, respectively, who identified as being at a normal weight at baseline (boys: 5.51, 2.20–13.80; girls: 2.93, 1.40–6.11).ConclusionThe results of the present study suggest that having a distorted body image in preadolescence is associated with being overweight or underweight in adolescence, among boys and girls, separately. Therefore, education regarding self-perceived weight could be important to help prevent underweight and overweight/obesity among preadolescent boys and girls in Japan.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Association between distorted body image and changes in weight status among normal weight preadolescents in Japan: a population-based cohort study

et al. 2016

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“…This finding suggests that underweight adolescents are likely to be underweight in young adulthood. Therefore, it is important to prevent underweight in adolescents for their health during both adolescence and adulthood, particularly in Japan, where the prevalence of underweight has increased among adolescents during recent years [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Lifestyle factors associated with underweight among Japanese adolescents: a cross-sectional study

et al. 2017

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BackgroundBecause underweight in adolescents poses several health problems, it is important to prevent it in adolescence. For the prevention of underweight, it is necessary to investigate risk factors, especially lifestyles, because these can be modified. However, a limited number of studies exist regarding lifestyle factors associated with underweight among adolescents. The present study aimed to investigate the relationship between lifestyle factors and underweight among Japanese adolescents.MethodsStudy subjects comprised 2641 seventh-grade school children (age 12 or 13 years) from the town of Ina, Saitama Prefecture, Japan. Measurements of height and weight were made for each subject, while information regarding lifestyles of each subject was obtained using a self-administered questionnaire. Underweight was determined by the age- and sex-specific body mass index cut-off points. A logistic regression model was used to estimate the odds ratio (OR) and 95% confidence interval (95% CI) for underweight.ResultsAdolescents who ate slowly were more likely to be underweight than those who did not eat slowly; the OR (95% CI) was 2.78 (1.77–4.39) in boys and 2.69 (1.81–3.98) in girls. Girls who did not exercise were more likely than those who exercised to be underweight (OR: 1.64, 95% CI: 1.07–2.51).ConclusionsThe present study showed that eating slowly and exercise were associated with underweight among Japanese adolescents. These results suggest that eating speed and exercise need to be considered in school health programs for healthy body weight.

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“…In Japan, Matsushita et al showed increasing trends in obesity prevalence in school children [2]. However, Inokuchi et al reported that the prevalence of thinness among Japanese adolescents has progressively increased [3,4]. Because thinness, overweight and obesity in adolescence have several adverse effects on health [5,6], these are serious public health issues.…”

Section: Introductionmentioning

confidence: 99%

Body Weight Perception, Mental Health, and Weight Control Behavior in Normal Weight Adolescents: Based on the Korea National Health and Nutrition Examination Survey 2013-2015

Lee¹

2017

Child Health Nurs Res

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Background: Distorted body image plays a significant role in the development of obesity, eating problems, and eating disorders. The aim of this study was to investigate the relationship between distorted body image and lifestyle among Japanese adolescent boys and girls. Methods: Subjects were 1731 seventh graders (age 12-13 years) from the Ina-town's junior high schools, Japan, from [2005][2006][2007][2008][2009]. The height and weight of each subject were measured. Childhood underweight, overweight, and obesity were defined using the body mass index cutoff points proposed by the International Obesity Task Force. Information regarding the self-perceived weight status and lifestyles (exercise, snacking after dinner, breakfast, wakeup time, bedtime) of each subject was collected using a self-administered questionnaire. Self-perceived weight status was categorized into three groups (thin, normal, or heavy), and compared with the subjects' actual weight status. Body image perception was categorized into the following three groups: an underestimated own weight status group (underestimated group), a correct own weight status group (correct group) and an overestimated own weight status group (overestimated group). Results: The proportion of boys in the underestimated group was higher than that of girls, while the opposite was true for the overestimated group (P < 0.001). There were no statistically significant differences in lifestyle between the underestimated group and the correct group regardless of sex. In contrast, there were statistically significant differences between the overestimated group and the correct group in the lifestyle factors of exercise among boys and snacking after dinner among girls. The adjusted odds ratio (OR) in boys who exercised daily significantly decreased (OR: 0.35,, while a significantly increased OR was observed in girls who snacked after dinner (OR: 1.53, 95 % CI: 1.07-2.19). Conclusion: Adolescent boys tended to underestimate their body weight, whereas adolescent girls were likely to overestimate their body weight. Furthermore, lifestyle factors associated with distorted body image differed by sex, with exercise affecting body image perception among boys and snacking after dinner affecting body image perception among girls. Thus, lifestyle may lead to distorted body image among adolescents.

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Trends in thin body stature among Japanese male adolescents, 2003–2012

Abstract: Thin body stature was documented in increasing proportion of Japanese male adolescents. BMI z-scores decreased across the entire BMI centile spectrums, indicating that the whole school population may be at risk of thinness.

Cited by 13 publications

References 16 publications

Association between distorted body image and changes in weight status among normal weight preadolescents in Japan: a population-based cohort study

Association between distorted body image and changes in weight status among normal weight preadolescents in Japan: a population-based cohort study

Lifestyle factors associated with underweight among Japanese adolescents: a cross-sectional study

Body Weight Perception, Mental Health, and Weight Control Behavior in Normal Weight Adolescents: Based on the Korea National Health and Nutrition Examination Survey 2013-2015

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