Prevalence of diabetes and pre-diabetes among workers: Japan Epidemiology Collaboration on Occupational Health Study

Few studies have examined the prevalence of diabetes using glycated haemoglobin (HbA1c), a newly recommended diagnostic test. The authors examined the prevalence of diabetes and pre-diabetes using both HbA1c and fasting plasma glucose (FPG) and their associations with risk factors for type 2 diabetes in a large-scale Japanese working population. Participants were 47,172 men and 8280 women aged 20-69 years who received periodic health check-up in nine companies which participated in the Japan Epidemiology Collaboration on Occupational Health study. Participants were categorised into diabetes (HbA1c?6.5% (?48mmol/mol), FPG?126mg/dl (?7.0mmol/L), or medication for diabetes), pre-diabetes (HbA1c 6.0-6.4% (42-46mmol/mol) or FPG 110-125mg/dl (6.1-6.9mmol/L) among those without diabetes), and normal glucose regulation. The prevalence of diabetes was 8.0% and 3.3% in men and women, respectively. Of individuals with diabetes, approximately 80% were defined by HbA1c?6.5% (?48mmol/mol) criterion. The prevalence of pre-diabetes was 14.1% in men and 9.2% in women. Prevalence of these glucose abnormalities increased with advancing age, especially during mid-40s and 50s. Higher body mass index and waist circumference, hypertension, dyslipidemia, and current smoking were each associated with higher prevalence of diabetes in both men and women. Using HbA1c and FPG criteria or current medication, one in 13 men and one in 30 women had diabetes in the present Japanese working population. Interventions targeted for those in an early stage of impaired glucose metabolism would be required to prevent diabetes.

Authors: Uehara A, Kurotani K, Kochi T, Kuwahara K, Eguchi M, Imai T, Nishihara A, Tomita K, Yamamoto M, Kuroda R, Nagata T, Omoto D, Murakami T, Shimizu C, Shimizu M, Miyamoto T, Nagahama S, Nakagawa T, Honda T, Yamamoto S, Okazaki H, Sasaki N, Nanri A, Pham NM, Kabe I, Mizoue T, Kunugita N, Dohi S; Japan Epidemiology Collaboration of Occupational Health Study Group. ;Full Source: Diabetes Research and Clinical Practice. 2014 Oct;106(1):118-27. doi: 10.1016/j.diabres.2014.07.013. Epub 2014 Jul 22. ;