| | IDA Group | Non-IDA Group | p-value |
|---|
| N = 19,397 | N = 38,794 |
|---|
| Age | 49.08 (17.54) | 49.08 (17.54) | 0.999 |
| ≦ 50 | 12,024 (61.99) | 24,069 (62.04) | |
| > 50 | 7373 (38.01) | 14,725 (37.96) | |
| Gender | 1.000 |
| Female | 14,891 (76.77) | 29,782 (76.77) | |
| Male | 4506 (23.23) | 9012 (23.23) | |
| Income level | < 0.001 |
| Low | 9366 (48.29) | 19,247 (49.61) | |
| Intermediate | 8604 (44.36) | 16,523 (42.59) | |
| High | 1427 (7.36) | 3024 (7.80) | |
| Comorbidity |
| Hypertension | 4991 (25.73) | 7874 (20.30) | < 0.001 |
| DM | 2719 (14.02) | 3529 (9.10) | < 0.001 |
| Dyslipidemia | 2822 (14.55) | 4435 (11.43) | < 0.001 |
| Hyperthyroidism | 551 (2.84) | 752 (1.94) | < 0.001 |
| Hypothyroidism | 199 (1.03) | 257 (0.66) | < 0.001 |
| COPD | 3618 (18.65) | 5606 (14.45) | < 0.001 |
| Stroke | 1642 (8.47) | 2235 (5.76) | < 0.001 |
| CAD | 2490 (12.84) | 3594 (9.26) | < 0.001 |
| CKD | 888 (4.58) | 412 (1.06) | < 0.001 |
| Cirrhosis | 566 (2.92) | 216 (0.56) | < 0.001 |
| Iron supplementation | 12,450 (64.19) | 1551 (4.00) | < 0.001 |
| Area | < 0.001 |
| Urban | 11,393 (58.74) | 23,754 (61.23) | |
| Suburban | 5974 (30.80) | 11,479 (29.59) | |
| Rural | 1286 (6.63) | 2216 (5.71) | |
| Remote area | 744 (3.84) | 1345 (3.47) | |
- Data are presented as mean ± SD or number (percentage, %). DM Diabetes mellitus, CAD Coronary artery disease, CKD Chronic kidney disease, COPD Chronic Obstructive Pulmonary Disease
