Table 1.
Characteristics of the study population
| Beijing | Shanghai | Total population | P | |
|---|---|---|---|---|
| N (%male) | 1574 (45.2) | 1636 (43.5) | 3210 (44.3) | |
| Age (years) | 58.3 ± 5.9 | 58.9 ± 6.0 | 58.6 ± 6.0 | 0.0095 |
| BMI (kg/m2) | 25.1 (22.8-27.4) | 23.5 (21.3-25.9) | 24.2 (22.0-26.6) | < 0.0001 |
| Current smoker (%) | 499 (31.7) | 403 (24.7) | 902 (28.1) | < 0.0001 |
| Current drinker (%) | 584 (37.1) | 327 (20.0) | 911 (28.4) | < 0.0001 |
| Physical activity, (MET-h/wk) | 49.1 (23.1-76.4) | 39.6 (23.1-65.5) | 46.2 (23.1-69.3) | < 0.0001 |
| Sleep duration, hour | 8.0 (7.0-8.5) | 7.5 (6.5-8.0) | 8.0 (7.0-8.0) | < 0.0001 |
| Self-reported sleep disorder (%) | 362 (22.97) | 251 (15.36) | 613 (19.10) | < 0.0001 |
| Fasting glucose (mmol/l) | 6.16 ± 1.96 | 5.53 ± 1.42 | 5.84 ± 1.74 | < 0.0001 |
| HbA1C (%) | 6.08 ± 1.22 | 5.90 ± 0.96 | 5.99 ± 1.10 | < 0.0001 |
| HOMA-B (%) | 100.1 ± 44.9 | 120.0 ± 46.9 | 110.3 ± 47.0 | < 0.0001 |
| HOMA-S (%) | 64.0 (47.3-89.5) | 63.5 (46.9-85.1) | 63.7 (47.1-86.9) | 0.05 |
| Diabetes (%) | 272 (17.3) | 152 (9.3) | 424 (13.2) | < 0.0001 |
| Obesity (%) | 320 (20.3) | 154 (9.4) | 474 (14.8) | < 0.0001 |
| Hypertension (%) | 978 (62.1) | 803 (49.1) | 1781 (55.5) | < 0.0001 |
Data are mean ± SD, median (inter-quartile range) or n (%). P represents significance of the differences between Beijing and Shanghai subpopulations.