Table 1.
Basic characteristics of participants of the study according to anemia status (n=12,614).
| Anemia | ||
| Variables | No | Yes |
| Patients (n) | 12,076 | 538 |
| Age (years) | 54.5 ± 11.1 | 54.2 ± 13.1 |
| Men (%) | 10107 (83.70) | 287 (53.40) |
| Education level (%) | ||
| Primary school | 1075 (8.90) | 44 (8.18) |
| High school | 9878 (81.80) | 421 (78.30) |
| College | 1123 (9.30) | 73 (13.60) |
| Income level (RMB/month) | ||
| <600 | 4021 (33.30) | 171 (31.70) |
| 600–1000 | 6763 (56.00) | 296 (55.10) |
| >1000 | 1292 (10.70) | 71 (13.30) |
| Occupation (%) | ||
| White collar | 857 (7.10) | 67 (12.40) |
| Blue collar | 6183 (51.20) | 363 (67.40) |
| Coalminer | 5036 (41.70) | 108 (20.20) |
| Physical activity (each time more than 20 min) (%) | ||
| Never | 1050 (8.70) | 46 (8.60) |
| <4 times/week | 9323 (77.20) | 417 (77.50) |
| ≥4 times/week | 1703 (14.10) | 75 (13.90) |
| Smoking status (%) | ||
| Never | 5700 (47.20) | 380 (70.60) |
| Past smoker | 846 (7.00) | 28 (5.20) |
| Current smoker | 5531 (45.80) | 130 (24.16) |
| Alcohol consumption (%) | ||
| Never | 5250 (43.47) | 327 (60.78) |
| Past drinker | 520 (4.31) | 22 (4.09) |
| Current drinker | 6306 (52.22) | 189 (35.13) |
| Myocardial infarction history (%) | 134 (1.11) | 10 (1.87) |
| Stroke history (%) | 350 (2.90) | 14 (2.60) |
| Cancer (%) | 40 (0.33) | 2 (0.37) |
| Hypertension (%) | 5857 (48.50) | 189 (35.10) |
| Diabetes (%) | 1461 (12.10) | 38 (7.10) |
| Body mass index (kg/m2) | 25.2 ± 3.47 | 24.1 ± 3.63 |
| CRP (mg/L)∗ | 0.78 (0.76–0.80) | 0.85 (0.74–0.97) |
| LDL-C (mmol/L) | 2.23 ± 0.71 | 2.01 ± 0.84 |
| HDL-C (mmol/L) | 1.57 ± 0.39 | 1.58 ± 0.39 |
| Triglycerides (mmol/L) | 1.60 ± 1.29 | 1.21 ± 1.03 |
| eGFR (mL/min per 1.73 m2) | 81.7 ± 21.2 | 80.5 ± 15.6 |
Data are presented as median (range), mean ± standard deviation or n (%).
∗
Mean and 95% confidence interval were presented due to non-normal distribution. CRP: C-reactive protein; LDL-C: Low-density lipoprotein cholesterol; HDL-C: High-density lipoprotein cholesterol; eGFR: Estimated glomerular filtration rate.