Impact of glucose tolerance status on the development of coronary artery disease among working-age men

Aims To examine the impact of glucose tolerance status on the development of coronary artery disease (CAD) in working-age men in Japan. Methods This population-based retrospective cohort study included 111,621 men aged 31–60 years [63,558 with normal glucose tolerance (NGT); 37,126 with prediabetes; 10,937 with diabetes]. The Cox proportional-hazards regression model was used to identify variables related to the incidence of CAD. Results Multivariate analysis showed that, compared with NGT, diabetes increased the risk of CAD by 17.3 times (95% CI: 6.36–47.0) at ages 31–40 years, by 2.74 times (95% CI: 1.85–4.05) at ages 41–50 years and by 2.47 times (95% CI: 1.69–3.59) at ages 51–60 years. The HRs for CAD in men with diabetes aged 31–40 equaled that of men with NGT aged 51–60 [18.2 (7.15–46.4) and 19.4 (8.28–45.4), respectively]. Conclusion The impact of diabetes on CAD was markedly greater in men aged 31–40 years compared with those aged 41–60 years.