Table 1.
Baseline characteristics of patients who underwent appendectomy (N = 892)
| Variables | Negative appendectomy (n = 77) |
Positive appendectomy (n = 815) |
P value |
|---|---|---|---|
| Age (year, IQR) | 31 (21,43) | 40 (24,57) | 0.003 |
| Female (n, %) | 54 (70.1) | 430 (52.8) | 0.005 |
| BMI (kg/m2, IQR) | 22.2(19.5,25.4) | 22.9 (20.8,25.7) | 0.052 |
| Pain localization (n, %) | 0.436 | ||
| RLQ area | 29 (37.7) | 254 (31.2) | |
| Periumbilical area | 37 (48.1) | 407 (49.9) | |
| Epigastric area | 7 (9.1) | 120 (14.7) | |
| Others | 4 (5.2) | 34 (4.2) | |
| Alvarado score (IQR) | 7 (6,8) | 7 (6,8) | 0.004 |
| Migratory of pain (n, %) | 39 (50.6) | 455 (55.8) | 0.451 |
| Anorexia (n, %) | 37 (48.1) | 327 (40.1) | 0.218 |
| Nausea (n, %) | 40 (51.9) | 491 (60.2) | 0.195 |
| RLQ tenderness (n, %) | 74 (96.1) | 792 (97.2) | 0.485 |
| Rebound tenderness (n, %) | 34 (44.2) | 438 (53.7) | 0.136 |
| Body temperature (°C, IQR) | 37.5 (36.8,38) | 37.2 (36.7,37.9) | 0.312 |
| White blood cell (UI, IQR) | 12,370 (10,610,14,530) | 14,770 (12,525,17,365) | < 0.001 |
| Neutrophil (%, IQR) | 77 (70, 82) | 83 (77, 87) | < 0.001 |
| Diarrhea (n, %) | 14 (18.2) | 79 (9.7) | 0.033 |
| Urologic complaint (n, %) | 1 (1.3) | 11 (1.3) | 1.000 |
| Gynecologic complaint (n, %) | 3 (3.9) | 7 (0.9) | 0.048 |
| Urinalysis (n, %) | 0.071 | ||
| Negative | 71 (92.2) | 775 (95.1) | |
| Positive | 5 (6.5) | 18 (2.2) | |
| Not perform | 1 (1.3) | 22 (2.7) |
All data are presented as median (IQR) unless indicated otherwise