Demographic and clinical characteristics of study subjects
| Variables | Wuxi study | Changzhou-Nantong study | Combined | |||
| Case (n=1200) | Control (n=1200) | Case (n=1725) | Control (n=2081) | Case (n=2925) | Control (n=3281) | |
| Gender | ||||||
| Male (%) | 478 (39.83) | 478 (39.83) | 620 (35.94) | 756 (36.33) | 1098 (37.53) | 1234 (37.61) |
| Smoke | ||||||
| Ever (%) | 320 (26.73) | 279 (23.37) | 401 (23.46) | 548 (26.55) | 721 (24.81) | 827 (25.38) |
| Alcohol consumption | ||||||
| Ever (%) | 208 (17.72) | 128 (10.73) | 330 (19.31) | 507 (24.60) | 538 (18.66) | 635 (19.51) |
| Age (years) | 57.43±9.77 | 56.43±8.02 | 58.77±10.31 | 56.66±10.81 | 58.21±10.11 | 56.57±9.88 |
| BMI (kg/m2) | 24.92±3.42 | 22.64±2.87 | 25.13±3.55 | 21.82±2.44 | 25.05±3.50 | 22.12±2.63 |
| Waist circumference (cm) | 85.46±9.27 | 81.42±9.48 | 87.18±10.29 | 76.08±7.96 | 86.47±9.92 | 78.04±8.93 |
| Hip circumference (cm) | 95.62±7.36 | 91.21±7.93 | 95.27±7.31 | 90.77±6.25 | 95.46±7.33 | 90.99±7.16 |
| FPG (mmol/L) | 8.00 (6.70, 10.3) | 4.50 (4.20, 4.80) | 8.10 (7.09, 10.50) | 4.52 (4.11, 4.99) | 8.05 (7.00, 10.42) | 4.50 (4.11, 4.90) |
| TG (mmol/L) | 1.77 (1.22.2.82) | 1.28 (0.95, 1.66) | 1.73 (1.16, 3.00) | 0.90 (0.68, 1.19) | 1.76 (1.19, 2.92) | 1.00 (0.74, 1.37) |
| TC (mmol/L) | 5.29 (4.58, 5.98) | 4.62 (4.14, 5.15) | 4.60 (3.91, 5.26) | 4.21 (3.70, 4.80) | 4.86 (4.17, 5.62) | 4.39 (3.85, 4.95) |
| HDL-C (mmol/L) | 1.36 (1.15, 1.56) | 1.48 (1.29,1.71) | 1.44 (1.21, 1.73) | 1.63 (1.40, 1.88) | 1.40 (1.19, 1.65) | 1.57 (1.35, 1.83) |
Data are expressed as number (per cent), mean±SD or median value (P25, P75).
BMI, body mass index; FPG, fasting plasma glucose; HDL-C, high-density lipoprotein cholesterol; TC, total cholesterol; TG, triglycerides.