Baseline characteristics stratified by work schedule
| Total | Daytime workers | Night shift workers | |
| Participants | n=9243 | n=7853 | n=1390 |
| Male, n (%) | 6765 (73.2) | 5918 (75.4) | 847 (60.9) |
| Median age (IQR), years | 46 (40–53) | 46 (40–54) | 43 (37–52) |
| Median BMI (IQR), kg/m2 | 27.3 (26.0–29.6) | 27.3 (26.0–29.5) | 27.7 (26.1–30.0) |
| Comorbidities, n (%) | |||
| Diabetes* | 1023 (11.5) | 890 (11.7) | 133 (10.2) |
| CAD | 141 (1.5) | 129 (1.6) | 12 (0.9) |
| CVD | 117 (1.3) | 100 (1.3) | 17 (1.2) |
| Cancer | 202 (2.2) | 172 (2.2) | 30 (2.2) |
| Hours of work, n (%) | |||
| ≥10 hours/day | 2753 (29.9) | 2355 (30.1) | 398 (28.8) |
| Hours of sleep, n (%) | |||
| <7 hours/day | 7777 (84.7) | 6612 (84.8) | 1165 (84.4) |
| Alcohol habits, n (%) | |||
| ≥3 times/week | 4680 (50.7) | 4097 (52.2) | 583 (42.0) |
| Smoking status, n (%) | |||
| Current smoker | 2498 (27.0) | 2101 (26.8) | 397 (28.6) |
*Diabetes was defined as fasting plasma glucose≥7.0 mmol/L (126 mg/dL), postprandial plasma glucose≥11.2 mmol/L (200 mg/dL), HbA1c≥6.5%, self-reported diabetes previously diagnosed by physicians, or the use of antidiabetic agents.
BMI, body mass index; CAD, coronary artery disease; CVD, cerebrovascular disorder.