TABLE 1.
Characteristics of the study population
| All samples | Beijing | Shanghai | P | |
|---|---|---|---|---|
| n (% male) | 3,210 (44.3) | 1,574 (45.2) | 1,636 (43.5) | |
| Age (years) | 58.6 ± 6.0 | 58.3 ± 5.9 | 58.9 ± 6.0 | 0.0095 |
| BMI (kg/m2) | 24.2 (22.0–26.6) | 25.1 (22.8–27.4) | 23.5 (21.3–25.9) | <0.0001 |
| Fasting glucose (mmol/l) | 5.84 ± 1.74 | 6.16 ± 1.96 | 5.53 ± 1.42 | <0.0001 |
| A1C (%) | 5.99 ± 1.10 | 6.08 ± 1.22 | 5.90 ± 0.96 | <0.0001 |
| Fasting insulin (pmol/l) | 82.2 (59.4–112.2) | 81.0 (57.6–110.7) | 84.0 (61.8–114.0) | 0.0777 |
| HOMA-B (%) | 110.3 ± 47.0 | 100.1 ± 44.9 | 120.0 ± 46.9 | <0.0001 |
| HOMA-S (%) | 63.7 (47.1–86.9) | 64.0 (47.3–89.5) | 63.5 (46.9–85.1) | 0.0454 |
| IFG (%) | 878 (27.4) | 579 (36.8) | 299 (18.3) | <0.0001 |
| Type 2 diabetes (%) | 424 (13.2) | 272 (17.3) | 152 (9.3) | <0.0001 |
Data are means ± SD, median (interquartile range), or n (%), unless otherwise indicated. P represents significance of the differences between individuals from Beijing and from Shanghai.