Table 1.
Baseline characteristics by diabetes status in CKB
| Diabetes status | ||||
|---|---|---|---|---|
| Variablea |
No diabetes (n=480,307) |
Total (n=30,007) |
Previously diagnosed (n=16,000) |
Screen‐detected (n=14,007) |
| Age (SD), year | 51.1 (10.6) | 57.2 (9.6) | 58.3 (9.1) | 55.9 (9.9) |
| Female, % | 276205 (58.8) | 17697 (61.4) | 9462 (62.0) | 8232 (60.7) |
| Urban region, % | 201987 (43.0) | 17525 (60.8) | 9936 (65.1) | 7568 (55.8) |
| Middle school and higher, % | 231284 (49.2) | 13955 (48.4) | 7682 (50.3) | 6344 (46.8) |
| Annual household income ≥ 35 000 Yuan, % | 84284 (17.9) | 5480 (19.0) | 3042 (19.9) | 2521 (18.6) |
| Regular smoker, % | ||||
| Male | 134378 (67.6) | 7196 (67.7) | 3607 (67.7) | 3589 (64.3) |
| Female | 7766 (3.1) | 781 (2.8) | 458 (2.8) | 323 (3.1) |
| Weekly drinker, % | ||||
| Male | 66248 (36.0) | 3493 (33.6) | 1402 (33.6) | 2091 (21.8) |
| Female | 5990 (1.9) | 232 (2.1) | 78 (2.1) | 154 (0.7) |
| Adult BMI (SD), kg/m2 | 23.6 (3.3) | 24.9 (3.6) | 24.6 (3.5) | 25.1 (3.7) |
| BMI at age 25 (SD), kg/m2 | 21.9 (2.5) | 22.8 (3.1) | 23.2 (3.2) | 22.5 (2.9) |
| SBP (SD), mmHg | 130.6 (21.0) | 138.5 (22.6) | 137.5 (22.6) | 139.3 (22.7) |
| Random plasma glucose (SD), mmol/L | 5.7 (1.1) | 12.6 (5.6) | 11.8 (5.7) | 13.3 (5.4) |
| Total physical activity (SD), MET h/day | 21.3 (13.9) | 18.8 (11.9) | 17.5 (10.6) | 19.8 (12.9) |
| Family history of diabetes, % | 21258 (4.5) | 3506 (12.2) | 2444 (16.0) | 1244 (9.2) |
| Family history of cancer, % | 65431 (13.9) | 4103 (14.2) | 2313 (15.2) | 1817 (13.4) |
a
Results were adjusted for age, sex and region (where appropriate). Values are presented as number (percentage) for categorical variables and mean (SD) for continuous variable. Abbreviations: BMI = body mass index; SBP = systolic blood pressure; MET = metabolic equivalent of task. 1 mmol/L= 18 mg/dL.