Table 1.
Comparison of population characteristics between control subjects and patients with actinic keratosis.
| Control subjects (N = 307,190) | Actinic keratosis patients (N = 61,438) | P value | |
|---|---|---|---|
| Gender (males) | 119,265 (38.8) | 23,853 (38.8) | 1 |
| Age (mean ± SD, years) | 62.0 ± 17.2 | 62.0 ± 17.2 | |
| Age | 1 | ||
| 20–39 | 39,445 (12.8) | 7889 (12.8) | |
| 40–64 | 106,940 (34.8) | 21,388 (34.8) | |
| 65– | 160,805 (52.3) | 32,161 (52.3) | |
| Follow-up years (person-year) | 5.00 | 5.07 | 1 |
| Lowest income level | 78,233 (25.5) | 13,796 (22.5) | < 0.01 |
| Place (urban) | 134,441 (44.0) | 27,088 (44.3) | 0.13 |
| Diabetes mellitus | 38,890 (12.7) | 7791 (12.7) | 0.89 |
| Hypertension | 108,344 (35.3) | 22,017 (35.8) | < 0.01 |
| Dyslipidemia | 55,096 (17.9) | 13,457 (21.9) | < 0.01 |
Values are presented as number (%) or mean ± SD.