Table 1 Demographic and clinical characteristics of the derivation and validation cohorts
Variables | Derivation cohort | Validation cohort | P value |
|---|---|---|---|
n | 2274 | 972 | |
Age, years | 58.3 ± 8.5 | 58.1 ± 8.5 | 0.213 |
Men, n (%) | 1046 (46.0%) | 448 (46.1%) | 0.161 |
BMI, kg/m2 | 26.6 ± 3.4 | 26.8 ± 3.4 | 0.612 |
SBP, mmHg | 130.0 ± 18.5 | 130.4 ± 18.6 | 0.558 |
DBP, mmHg | 80.3 ± 10.8 | 80.5 ± 10.7 | 0.522 |
TC, mmol/L | 5.0 (4.3, 5.8) | 5.0 (4.4, 5.8) | 0.245 |
TG, mmol/L | 2.6 (2.1, 3.2) | 2.6 (2.1, 3.3) | 0.432 |
HDL, mmol/L | 1.3 (1.0, 1.5) | 1.3 (1.1, 1.5) | 0.347 |
LDL, mmol/L | 3.0 (2.4, 3.6) | 3.0 (2.4, 3.6) | 0.463 |
FBG, mmol/L | 2.9 (2.5, 3.3) | 2.9 (2.5, 3.4) | 0.235 |
HbA1c, % | 5.1 (4.8, 5.5) | 5.1 (4.7, 5.5) | 0.711 |
C-reactive protein, mg/L | 1.0 (0.5, 2.0) | 1.0 (0.5, 1.9) | 0.322 |
eGFR, mL/min/1.73m2 | 85.2 (75.4, 96.2) | 85.4 (75.6, 96.5) | 0.082 |
Uric acid, mg/dl | 4.0 (3.4, 4.7) | 4.0 (3.5, 4.7) | 0.260 |
Hemoglobin, g/dl | 14.0 (12.9, 15.2) | 14.0 (12.9, 15.2) | 0.858 |
Sleep duration, h | 7.0 (6.0, 8.0) | 7.0 (6.0, 8.0) | 0.612 |
Education status, n (%) | 0.415 | ||
Illiterate | 660 (29.0%) | 283 (29.1%) | |
Primary school and below | 952 (41.9%) | 405 (41.7%) | |
Middle school and above | 662 (29.1%) | 284 (29.2%) | |
Residence, n (%) | 0.326 | ||
Rural | 1529 (67.2%) | 656 (67.5%) | |
Urban | 745 (32.8%) | 316 (32.5%) | |
Marital status, n (%) | 0.319 | ||
Single | 245 (10.7%) | 106 (10.9%) | |
Married/cohabiting | 2029 (89.3%) | 866 (89.4%) | |
Smoking status, n (%) | 0.256 | ||
Non | 1978 (87.0%) | 845 (86.9%) | |
Current | 296 (13.0%) | 127 (13.1%) | |
Drinking status, n (%) | 0.384 | ||
Non | 1778 (78.2%) | 758 (78.0%) | |
Current | 496 (21.8%) | 214 (22.0%) |