Table 1.
Baseline characteristics of study population.
| Variables | Total (n = 11,113) | Low-Intermediate AIP (n = 8541) | High AIP (n = 2572) | p-Value |
|---|---|---|---|---|
| Age (year) | 53.8 ± 10.6 | 53.8 ± 10.7 | 54.4 ± 10.2 | <0.01 |
| Male (%) | 5129 (46.2) | 3909 (45.8) | 1220 (47.4) | 0.137 |
| Spouse (live, %) | 10,261 (91.6) | 7814 (91.5) | 2369 (92.1) | 0.320 |
| Education (%) | 0.325 | |||
| Primary school or below | 5528 (49.7) | 4192 (49.1) | 1336 (51.9) | |
| Middle school | 4539 (40.8) | 3573 (41.8) | 996 (37.6) | |
| High school or above | 1046 (9.4) | 776 (9.1) | 270 (10.5) | |
| Family income (CNY/year, %) | 0.248 | |||
| ≤5000 | 1375 (12.4) | 1047 (12.3) | 328 (12.8) | |
| 5000–20,000 | 6060 (54.5) | 4710 (55.1) | 1350 (52.5) | |
| >20,000 | 3678 (33.1) | 2784 (32.6) | 894 (34.7) | |
| Race | 0.20 | |||
| Han | 10,540 (94.8) | 8088 (94.7) | 2452 (95.3) | |
| Others a | 573 (5.2) | 453 (5.3) | 120 (4.7) | |
| Current smoking status (%) | 3932 (35.4) | 2994 (35.1) | 938 (36.5) | 0.190 |
| Current drinking status (%) | 2502 (22.5) | 1969 (23.1) | 533 (20.7) | <0.05 |
| Diet score | 2.33 ± 1.13 | 2.35 ± 1.11 | 2.26 ± 1.17 | <0.001 |
| SBP (mmHg) | 141.6 ± 23.4 | 140.2 ± 23.3 | 146.3 ± 23.3 | <0.001 |
| DBP (mmHg) | 82.0 ± 11.8 | 81.1 ± 11.6 | 85.1 ± 11.9 | <0.001 |
| BMI (kg/m2) | 24.8 ± 3.7 | 24.2 ± 3.5 | 26.6 ± 3.5 | <0.001 |
| WC (cm) | 82.4 ± 9.8 | 81.8 ± 9.5 | 87.9 ± 8.9 | <0.001 |
| FPG (mmol/L) | 5.90 ± 1.64 | 5.75 ± 1.38 | 6.42 ± 2.22 | <0.001 |
| TC (mmol/L) | 5.24 ± 1.09 | 5.13 ± 1.01 | 5.57 ± 1.26 | <0.001 |
| TG (mmol/L) | 1.64 ± 1.51 | 1.13 ± 0.44 | 3.32 ± 2.34 | <0.001 |
| LDL-C (mmol/L) | 2.93 ± 0.82 | 2.87 ± 0.79 | 3.10 ± 0.91 | <0.001 |
| HDL-C (mmol/L) | 1.41 ± 0.38 | 1.49 ± 0.38 | 1.12 ± 0.22 | <0.001 |
| AIP | −0.089 ± 0.315 | −0.140 ± 0.210 | 0.425 ± 0.194 | <0.001 |
Data are expressed as the mean (SD) or as n (%). Abbreviations: AIP: atherogenic index of plasma; BMI: body mass index; CNY: China Yuan; DBP: diastolic blood pressure; FPG: fasting plasma glucose; HDL-C: high-density lipoprotein cholesterol; LDL-C: low-density lipoprotein cholesterol; SBP: systolic blood pressure; TC: total cholesterol; TG: triglycerides; WC: waist circumference; a Including some ethnic minorities in China, such as Mongol and Manchu.