Table 1. Prevalence of anemia in various conditions.
| Characteristics | Anemia (n = 987) | Total (n = 2,198) | P value |
|---|---|---|---|
| Gender | < 0.001 | ||
| Female | 443 (51.8) | 856 | |
| Male | 544 (40.5) | 1,342 | |
| CKD stage | < 0.001 | ||
| 1 | 26 (10.0) | 259 | |
| 2 | 65 (15.9) | 410 | |
| 3a | 130 (32.8) | 396 | |
| 3b | 221 (46.6) | 474 | |
| 4 | 407 (78.9) | 516 | |
| 5 | 138 (96.5) | 143 | |
| Causes of CKD | < 0.001 | ||
| DN | 387 (75.9) | 510 | |
| Hypertensive nephropathy | 162 (39.9) | 406 | |
| Glomerulonephritis | 274 (34.9) | 785 | |
| Polycystic kidney disease | 99 (27.3) | 362 | |
| Miscellaneous | 65 (48.1) | 135 | |
| Work status | < 0.001 | ||
| Employed | 442 (44.8) | 1,211 | |
| Unemployed | 542 (55.2) | 981 | |
| Unknown | 3 (50.0) | 6 | |
| Marriage | < 0.001 | ||
| Married | 824 (44.8) | 1,841 | |
| Unmarried | 73 (34.3) | 213 | |
| Divorced or widowed | 86 (62.8) | 137 | |
| Unknown | 4 (57.1) | 7 | |
| Economic status, 1,000 KRW/mon | < 0.001 | ||
| High (> 4,500) | 168 (34.5) | 487 | |
| Middle (1,500–4,500) | 522 (45.3) | 1,152 | |
| Low (< 1,500) | 552 (55.2) | 496 | |
| Unknown | 23 (36.5) | 63 | |
| Education | < 0.001 | ||
| Graduated elementary school or less | 162 (60.7) | 267 | |
| Graduated middle school | 142 (54.8) | 259 | |
| Graduated high school | 354 (46.0) | 769 | |
| Graduated college or more | 322 (36.1) | 893 | |
| Unknown | 7 (70.0) | 10 | |
| Smoking | < 0.001 | ||
| Never | 563 (47.5) | 1,185 | |
| Former | 310 (46.4) | 668 | |
| Current | 114 (33.1) | 344 | |
| Unknown | 1 (100.0) | 1 | |
| Modified Charlson comorbidity index | < 0.001 | ||
| Low (≤ 3) | 334 (29.0) | 1,150 | |
| Moderate (4–5) | 372 (57.9) | 642 | |
| High (6–7) | 235 (68.5) | 343 | |
| Very high (≥ 8) | 46 (73.0) | 63 |
CKD = chronic kidney disease, DN = diabetic nephropathy, KRW = Korean won.