Ong ZL, Chaturvedi N, Tillin T, et al. - Since poor sleep quality (difficulty falling asleep, difficulty maintaining sleep, and sleep-disordered breathing) is correlated with increased risk of developing type 2 diabetes, researchers intended to determine if there is a link between mid-life sleep quality and later-life type 2 diabetes risk, as well as the potential moderating effect of ethnicity. Complete-case analysis was conducted on 2,189 candidates without diabetes at baseline (age = 51.7 ± 7 SD). Findings revealed that there were 484 cases of incident type 2 diabetes (22%). Overall, no links were found between sleep exposure and diabetes risk. The link between snoring (proxy for sleep-disordered breathing) and type 2 diabetes seemed to be ethnically modified, with South Asians having the strongest connection. The study results do not indicate any significant associations for difficulty falling asleep, waking up early in the morning, or waking up tired.