Table 2. Clinical Characteristics of Colon Cancer Patients With and Without Pre-existing IDA.
| Variable | Without IDA | With IDA | Total | p-value |
| (n = 15912) | (n = 1260) | (n = 17172) | ||
| Number (%) | Number (%) | Number (%) | ||
| Age, years (mean ± SD) | 70.8±8.5 | 72.7±8.5 | 70.9±8.5 | <0.0001a |
| 55–64 | 4089 (25.7) | 235 (18.7) | 4324 (25.2) | |
| 65–74 | 6251 (39.3) | 482 (38.2) | 6733 (39.2) | |
| ≥75 | 5572 (35.0) | 543 (43.1) | 6115 (35.6) | |
| Gender | <0.0001b | |||
| Female | 6738 (42.4) | 685 (54.4) | 7423 (43.2) | |
| Male | 9174 (57.6) | 575 (45.6) | 9749 (56.8) | |
| Hypertension | 7193 (45.2) | 604 (47.9) | 7797 (45.4) | 0.06b |
| DM | 3236 (20.3) | 351 (27.9) | 3587 (20.9) | <0.0001b |
| Hyperlipidemia | 2325 (14.6) | 182 (14.4) | 2507 (14.6) | 0.87b |
| CVD | 8704 (54.7) | 776 (61.6) | 9480 (55.2) | <0.0001b |
| CKD | 352 (2.2) | 58 (4.6) | 410 (2.4) | <0.0001b |
| Stage | 0.54b | |||
| I/II | 4701 (29.5) | 362 (28.7) | 5063 (29.5) | |
| III/IV | 11211 (70.5) | 898 (71.3) | 12109 (70.5) |
IDA: iron deficiency anemia; SD: standard deviation; DM: diabetes mellitus; CVD: cardiovascular diseases; CKD: chronic kidney disease.
a
indicates an ANOVA test;
b
indicates a chi-square test.