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Table 1 Characteristics of all participants according to provinces
| Variable | Fujian | Shaanxi | p value |
|---|---|---|---|
| N | 2672 | 3254 | |
| Sex(Male/Female) | 1056/1616 | 1366/1888 | 0.056 |
| Age, n (%) | 0.037 | ||
| 20-40 years | 1133 (42.4%) | 1385 (42.6%) | |
| 40-60 years | 1102 (41.2%) | 1411 (43.4%) | |
| Above 60 years | 437 (16.4%) | 458 (14.1%) | |
| Ethnics (Han), n (%) | 2655 (99.4%) | 3170 (98.8%) | 0.015 |
| Urban, n (%) | 2149 (80.4%) | 2051 (63.0%) | <0.001 |
| Education level, n (%) | <0.001 | ||
| College and above | 602 (22.5%) | 897 (28.2%) | |
| Secondary school | 1510 (56.5%) | 1585 (49.9%) | |
| Elementary school | 420 (15.7%) | 465 (14.6%) | |
| Uneducated | 140 (5.2%) | 232 (7.3%) | |
| Yearly family income, n (%) | <0.001 | ||
| Below 10,000 CNY | 748 (46.3%) | 1332 (46.3%) | |
| 10,000-30,000 CNY | 1180 (48.4%) | 1185 (41.2%) | |
| Above 30,000 CNY | 508 (20.9%) | 361 (12.5%) | |
| Cigarette smoking, n (%) | 470 (17.6%) | 770 (23.7%) | <0.001 |
| Alcohol drinking, n (%) | 721 (27.1%) | 786 (24.4%) | 0.016 |
| Physical activity, n (%) | 1370 (52.2%) | 1215 (37.5%) | <0.001 |
| Family history of diabetes, n (%) | 473 (17.7%) | 353 (10.8%) | <0.001 |
| Number of metabolic risk factors, n (%) | <0.001 | ||
| 0 | 2067 (77.4%) | 2612 (80.3%) | |
| 1 | 398 (14.9%) | 493 (15.2%) | |
| 2 | 245 (4.1%) | 104 (3.2%) | |
| 3 | 66 (2.5%) | 45 (1.4%) | |
| Central obesity, n (%) | 879 (33.1%) | 1352 (42.0%) | <0.001 |
| Fasting glucose, mmol/L | 5.24 ± 1.55 | 5.31 ± 1.41 | 0.052 |
| 2-hour glucose, mmol/L | 6.92 ± 3.64 | 6.62 ± 3.29 | <0.001 |
