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. 2017 Jun 8;7(5):e014684.
doi: 10.1136/bmjopen-2016-014684.

Weight cycling and the subsequent onset of type 2 diabetes mellitus: 10-year cohort studies in urban and rural Japan

Hiroshi Yokomichi  1 , Sachiko Ohde  2 , Osamu Takahashi  2 , Mie Mochizuki  3 , Atsunori Takahashi  1 , Yoshioki Yoda  4 , Masahiro Tsuji  4 , Yuka Akiyama  1 , Zentaro Yamagata  1
Affiliations

Weight cycling and the subsequent onset of type 2 diabetes mellitus: 10-year cohort studies in urban and rural Japan

Hiroshi Yokomichi et al. BMJ Open. .

Abstract

Objective: To investigate how weight cycling (gaining and losing weight) affects the risk of diabetes.

Design: Cohort studies.

Setting: Primary healthcare in urban and rural Japan.

Participants: 20 708 urban and 9670 rural residents.

Primary outcome measures: ORs for diabetes in those with weight loss, weight loss-gain, stable weight, weight gain-loss and weight gain over 10 years. Weight gain and loss were defined as a change of more than ±4% from baseline weight.

Results: In the urban region, the ORs relative to the stable group for the loss-gain and gain-loss groups were 0.63 (95% CI 0.45 to 0.89) and 0.51 (95% CI 0.32 to 0.82) for men and 0.72 (95% CI 0.39 to 1.34) and 1.05 (95% CI 0.57 to 1.95) for women. In the rural region, they were 1.58 (95% CI 0.78 to 3.17) and 0.44 (95% CI 0.15 to 1.29) in men and 0.41 (95% CI 0.12 to 1.44) and 0.77 (95% CI 0.28 to 2.14) in women. The ORs for an increase in weight between 5 and 10 kg from the age of 20 years were 1.54 (95% CI 1.03 to 2.30) in men and 0.96 (95% CI 0.55 to 1.65) in women.

Conclusions: In Japan, weight cycling was associated with a significant reduction in the risk of diabetes for men from urban regions. The associations were unclear for women from urban regions and both men and women from rural regions. These results differ from those in Western studies, probably because of differences in diet, insulin secretion and sensitivity and weight-consciousness.

Keywords: Asian; body mass index; body weight changes; sarcopenia; type 2 diabetes.

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1
How participants were categorised into the five weight change patterns. BMI, body mass index.
See this image and copyright information in PMC

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