Cumulative incidence of metabolic risk factors among night-shift workers and daytime workers during the 4-year follow-up
| Component | Total population (N = 738) | Night-shift workers (n = 402) | Daytime workers (n = 336) |
| Visceral obesity, n (%) | 83 (11.2) | 57 (14.2) | 26 (7.7) |
| High BP, n (%) | 85 (11.5) | 45 (11.2) | 40 (11.9) |
| Low HDL-C, n (%) | 89 (12.1) | 56 (13.9) | 33 (9.8) |
| High TG, n (%) | 89 (12.1) | 51 (12.7) | 38 (11.3) |
| High glucose, n (%) | 33 (4.5) | 20 (5.0) | 13 (3.9) |
Components by National Cholesterol Education Programme definition: visceral obesity: waist ⩾102 cm in men and ⩾88 cm in women; high BP: BP ⩾130 or ⩾85 mmHg or treatment for hypertension; low HDL-C: HDL-C <1.036 mmol/l−1 (40 mg/dl) in men and <1.295 mmol/l−1 (50 mg/dl) in women; high TG: serum triglycerides ⩾1.695 mmol/l−1 (150 mg/dl); high glucose: plasma glucose ⩾5.6 mmol/l−1 (100 mg/dl).
BP, blood pressure; HDL-C, high-density lipoprotein-cholesterol; TG, triglyceride.