The prevalence of co-morbid depression among employees with type 2 diabetes in a Japanese corporation: a descriptive study using an integrated health database.

OBJECTIVETo determine the prevalence of comorbid depression among people with type 2 diabetes using the integrated health database.METHODSA total of 6543 people aged 18-65 years were selected from the employees of a Japanese corporation. Using the corporation's integrated health database, which consisted of medical claims data and a self-reported questionnaire from the fiscal year 2000, this study was undertaken to identify the prevalence, the odds ratio and some related factors.RESULTSThe prevalence of co-morbid depression among people with type 2 diabetes was 2.6%. The crude odds ratio of co-morbid depression among those with type 2 diabetes was 2.20 (95% CI 0.88-5.50). After adjustment for covariates (gender, age, alcohol drinking, smoking, exercise, and dietary restriction), the odds ratio of co-morbid depression among those with type 2 diabetes was 2.33 (0.86-6.33).CONCLUSIONSUsing the integrated health database, it was suggested that patients with type 2 diabetes were more likely to suffer from depression and there was a relationship between depression and dietary restriction of portion control.