Long-term weight change in adulthood and incident diabetes mellitus: MY Health Up Study

• Published in: Diabetes research and clinical practice Vol. 102; no. 2; pp. 138 - 146
• Main Authors: Kaneto, Chie, Toyokawa, Satoshi, Miyoshi, Yuji, Suyama, Yasuo, Kobayashi, Yasuki
• Format: Journal Article
• Language: English
• Published: Ireland Elsevier Ireland Ltd 01.11.2013
• Subjects: Adult; Body Mass Index; Body weight changes; Diabetes mellitus; Diabetes Mellitus, Type 2 - etiology; Endocrinology & Metabolism; Female; Humans; Male; Middle Aged; Obesity; Obesity - complications; Proportional Hazards Models; Risk Factors; Weight gain; Weight Gain - physiology; Body mass index; Obesity; Body weight changes; Weight gain; Diabetes mellitus
• ISSN: 0168-8227; 1872-8227
• DOI: 10.1016/j.diabres.2013.08.011

Abstract Aim To investigate whether long-term weight/BMI change in adulthood has a significant impact on the incidence of diabetes, independent of attained weight status. Methods A number of 13,700 participants (2962 men and 10,738 women) aged 36 to 55 years were followed for up to 5 years using data from annual health checkups. Incident cases of diabetes were identified from self-reports or single fasting plasma glucose measurements (≥7.0 mmol/l). Weight/BMI change was calculated from participants’ weight/BMI values at age 20 years and weight/BMI values at a given point during follow-up and used as a time-dependent variable in age-stratified multivariate Cox proportional hazards models. Results During the 5 year follow-up, 408 participants (137 men and 271 women) developed diabetes. Even after adjusting for BMI during follow-up and other possible confounders, weight/BMI gain since age 20 years was significantly associated with an increased risk of developing diabetes. The hazard ratios were: 2.30 (95% confidence interval (CI): 1.31–4.04) for those who gained 6.0 to <10.0 kg and 3.09 (95% CI: 1.79–5.34) for those who gained ≥10.0 kg [reference: <2.0 kg change]; and 2.61 (95% CI: 1.58–4.31) for those who gained 3.0 to <5.0 kg/m2 and 3.70 (95% CI: 2.22–6.16) for those who gained ≥5.0 kg/m2 [reference: <1.0 kg/m2 change]. Conclusions The results indicate that long-term weight/BMI gain in adulthood is a significant predictor for the development of diabetes, independent of attained weight status. Because weight gain within the normal weight range could increase the risk of diabetes, non-obese people should also be warned against possible weight gain.