Changes in body mass index by birth cohort in Japanese adults: results from the National Nutrition Survey of Japan 1956-2005

Funatogawa, Ikuko; Funatogawa, Takashi; Nakao, Mutsuhiro; Karita, Kanae; Yano, Eiji

doi:10.1093/ije/dyn182

Cited by 67 publications

(62 citation statements)

References 31 publications

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“…The data represent periods , i.e., children measured in particular years, not cohorts of children born in the same year. South Korean data were available only for the years 1965, 1975, 1984, 1997, and 2005 (J. Y. Kim et al, 2008), while the Japanese data came from annual National Nutrition Surveys carried out between 1949 and 2011 by the Japanese Ministry of Health and Welfare (latterly Ministry of Health, Labor and Welfare)—see Funatogawa, Funatogawa, Nakao, Karita, and Yano (2009) for details. The South Korean surveys were very large, with each age group mean based on 15,000 to 60,000 children, while the Japanese samples were much smaller, ranging in size from 500 to 3500 for all ages 1–20 years.…”

Section: Methodsmentioning

confidence: 99%

“…The Japanese data being available annually allowed growth curves to be constructed both by cohort (i.e., successive years of age for a given year of birth cohort correspond to successive years of measurement)—see Funatogawa, Funatogawa, Nakao, Karita, and Yano (2009)—as well as by period. (Note though that this was not possible for the Korean data, which were available only by decade of measurement, so the primary country comparison here is necessarily based on period.…”

Section: Methodsmentioning

confidence: 99%

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Fifty years of child height and weight in Japan and South Korea: Contrasting secular trend patterns analyzed by SITAR

Cole

Mori

2017

American J Hum Biol

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Objectives Japanese and South Koreans have traditionally been shorter than Europeans, but have recently become appreciably taller. The aim was to quantify the secular trend patterns in height and weight growth in the two countries over 50 years using the SITAR growth curve model. Methods Data on mean height and weight by sex in 1‐year age groups from 1 to 20 years were obtained by decade in South Korea (1965–2005) and Japan (1950–2010). The data were analyzed using SITAR (SuperImposition by Translation And Rotation), which estimates a mean curve and three adjustments–size, timing and intensity–reflecting how the individual surveys differ from the mean. A sensitivity analysis compared results for the Japanese data based on cohort as well as period. Results Growth patterns in the two countries changed dramatically over the study period, affecting not only height and weight but also developmental age, in that the growth period advanced in timing and shrank in duration. SITAR fitted the data well. The trends were larger in South Korea than Japan, and puberty timing in Japan stabilized by 1970. Most of the height increment seen in adults had already accrued by age 1.5 years, whereas the adult weight increment accrued throughout childhood. Conclusions The secular height trend in these countries represents increased growth in the long bones during infancy, so it can be viewed as the inverse of stunting. There are striking country differences in growth pattern, but they are not easily explained by differences in national income, diet or lifestyle.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Fifty years of child height and weight in Japan and South Korea: Contrasting secular trend patterns analyzed by SITAR

Cole

Mori

2017

American J Hum Biol

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“…Among these, obesity is an important and potentially modifiable risk factor for breast cancer, the incidence of which is increasing in most countries (World Health Organization 2011). In Japan also, body mass index (BMI) has consistently increased in older women, albeit that the prevalence of obesity remains lower than in Western countries (Funatogawa et al 2009;OECD 2010).…”

Section: Introductionmentioning

confidence: 99%

Differential impact of body mass index and its change on the risk of breast cancer by molecular subtype: A case-control study in Japanese women

et al. 2012

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Body mass index (BMI) is an independent risk factor for luminal-type breast cancer in Western populations. However, it is unclear whether the impact of BMI differs according to breast cancer subtype in Japanese populations. We conducted a case-control study with 715 cases and 1430 age-and menopausal status-matched controls to evaluate the associations of BMI and its change (from age 20 years to the current age) with breast cancer risk. We applied conditional logistic regression models to estimate odds ratios (ORs) and 95% confidence intervals (CIs). Tumor subtypes were divided into four subtypes, namely the luminal, luminal/HER2, HER2-rich, and triple-negative subtypes. Current BMI and BMI change were positively associated with postmenopausal breast cancer risk. On stratified analysis by tumor subtype, we observed associations between current BMI and BMI change and postmenopausal breast cancer risk for the luminal subtype, with OR for each 1 kg/m 2 increase in current BMI of 1.14 (95% CI: 1.07 -1.20) and the corresponding OR of BMI change of 1.16 (1.09 -1.23) (each P trend < 0.001). Additionally, we found the same tendency for the triple-negative subtype, with the OR for a 1 kg/m 2 increase in current BMI of 1.21 (1.05 -1.39) and that for BMI change of 1.18 (1.02 -1.36) (P trend was 0.008 and 0.024, respectively). In premenopausal women, a suggestive inverse association was observed between BMI change and breast cancer risk for the luminal subtype only, with OR of BMI change of 0.93 (0.87 -1.00, P trend = 0.054). No association was seen between BMI at age 20 years and risk of any tumor subtype. In conclusion, BMI and its change are associated with the risk of both luminal and triple-negative breast cancer among postmenopausal Japanese women. These findings suggest the etiological heterogeneity of breast cancer among tumor subtypes.

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“…Obesity rates are increasing worldwide, with elevated risk of T2D, high blood pressure, dyslipidemia, and cardiovascular disease. In Japan, the mean body mass indexes (BMI) of men and elderly women are increasing [3], and obesity is becoming a major public health problem. No drugs for treating obesity were available until recently in Japan.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Effects of Ipragliflozin on Adipose Tissue in Japanese Patients with Obese Type 2 Diabetes

Si¹,

Sekido²,

Ohkubo³

et al. 2017

J Obes Weight Loss Ther

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A long-term effect of ipragliflozin on adipose tissue mass reduction by ipragliflozin in Japanese patients with obese type2 diabetes (mean BMI 35.1 ± 1.1 kg/m 2 ) was investigated. 17 of 20 participants completed this study. Ipragliflozin was administered (50 mg/day) once daily for 12 months. At 0, 3, 6 and 12 months, visceral and subcutaneous adipose tissue area was determined by two different bioelectrical impedance methods, and blood samples for HbA1c, renal function, lipids and liver function obtained, and body weight and blood pressure recorded. The primary endpoint was decrease in body fat mass. Secondary endpoints included changes in body weight and the laboratory data. Visceral fat area (cm 2 , mean ± SD) at 0, 3, 6 and 12 months was 166.0 ± 49.7, 149.7 ± 46.1, 149.7 ± 42.4 and 148.5 ± 40.2, respectively: the value at 3 months was significantly lower than baseline (P=0.027). Subcutaneous fat at the corresponding time points was 359.3 ± 110.5, 316.6± 87.1, 326.8 ± 87.2 and 325.9 ± 90.4, respectively: the values at each post treatment period were significantly less than the baseline (P=0.003, 0.018 and 0.036 for the three points, respectively). Body weight was significantly reduced by 12 months (P=0.045). Serum alanine aminotransferase, aspartate aminotransferase, and γ-glutamyl transpeptidase levels decreased significantly. There was no significant correlation between serum hepatobiliary enzyme levels and γ-body weight or visceral fat. But γ-GTP was correlated with subcutaneous fat (Spearman's P=0.004). During 1 year-interval, ipragliflozin significantly reduced subcutaneous adipose tissue and serum hepatobiliary enzyme levels, and may be useful in patients with obese diabetes.

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Changes in body mass index by birth cohort in Japanese adults: results from the National Nutrition Survey of Japan 1956-2005

Cited by 67 publications

References 31 publications

Fifty years of child height and weight in Japan and South Korea: Contrasting secular trend patterns analyzed by SITAR

Fifty years of child height and weight in Japan and South Korea: Contrasting secular trend patterns analyzed by SITAR

Differential impact of body mass index and its change on the risk of breast cancer by molecular subtype: A case-control study in Japanese women

Long-Term Effects of Ipragliflozin on Adipose Tissue in Japanese Patients with Obese Type 2 Diabetes

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