Table 1.
Basic characteristics between patients who had anal abscess and anal fistula diseases and patients with other anorectal complaints
| Variables | Controls (n = 471) | Cases (n = 334) | χ2 or Z | P |
|---|---|---|---|---|
| Age (years), median (Q1, Q3) | 35.0 (30.0, 44.0) | 34.0 (29.0, 43.0) | −0.863 | 0.388 |
| Age group, n (%) | ||||
| 18–29 years | 116 (24.6) | 90 (26.9) | 3.200 | 0.525 |
| 30–39 years | 196 (41.6) | 139 (41.6) | ||
| 40–49 years | 77 (16.4) | 59 (17.7) | ||
| 50–59 years | 46 (9.8) | 30 (9.0) | ||
| ≥60 years | 36 (7.6) | 16 (4.8) | ||
| Race, n (%) | ||||
| Han | 448 (95.1) | 321 (96.1) | 0.449 | 0.503 |
| Minority | 23 (4.9) | 13 (3.9) |
Mann-Whitney U-test and Chi-square test were used to examine differences in baseline characteristics between groups.