Table 2.
Dataset description for patients with and without appendicitis.
| Variable | Appendicitis (n = 247) | No appendicitis(n = 183) | P-value |
|---|---|---|---|
| Age, years | 11.48 [9.18, 13.29] | 12.10 [9.57, 14.46] | 0.6 |
| Male sex, % | 58.13 | 47.83 | 0.5 |
| Height, cm | 149.1 [137.5, 162.0] | 152.2 [139.6, 164.0] | 0.8 |
| Weight, kg | 39.75 [31.00, 52.75] | 47.10 [32.48, 57.08] | 0.4 |
| Body mass index (BMI), kg/m2 | 17.84 [15.72, 20.55] | 18.90 [15.95, 22.39] | 0.3 |
| Alvarado score, pts | 7 [5, 8] | 4 [3, 6] | ≤0.001 |
| Pediatric appendicitis score, pts | 5 [4, 7] | 4 [3, 5] | ≤0.001 |
| Peritonitis/abdominal guarding, % | 61.38 | 7.61 | ≤0.001 |
| Migration of pain, % | 30.89 | 18.48 | 0.09 |
| Tenderness in right lower quadrant (RLQ), % | 97.97 | 95.63 | 1.0 |
| Rebound tenderness, % | 40.98 | 25.68 | ≤0.05 |
| Cough tenderness, % | 32.65 | 19.57 | 0.06 |
| Psoas sign, % | 27.85 | 33.91 | 1.0 |
| Nauseous/vomiting, % | 62.20 | 48.37 | 0.1 |
| Anorexia, % | 31.71 | 25.68 | 1.0 |
| Body temperature, °C | 37.75 [37.20, 38.20] | 37.20 [36.80, 37.85] | ≤0.001 |
| Dysuria, % | 3.45 | 7.82 | 0.7 |
| Abnormal stool, % | 28.40 | 27.07 | 1.0 |
| White blood cell count, 103/μl | 13.80 [10.68, 17.40] | 8.80 [7.00, 11.90] | ≤0.001 |
| Neutrophils, % | 78.95 [70.40, 84.17] | 61.50 [52.35, 77.55] | ≤0.001 |
| C-reactive protein, mg/l | 15.00 [4.00, 46.00] | 1.00 [0.00, 13.00] | ≤0.001 |
| Ketones in urine, % | 44.94 | 31.54 | 0.5 |
| Erythrocytes in urine, % | 23.42 | 20.81 | 1.0 |
| White blood cells in urine, % | 12.03 | 12.75 | 1.0 |
| Visibility of appendix, % | 86.53 | 34.97 | ≤0.001 |
| Appendix diameter, mm | 8.00 [7.00, 10.00] | 5.00 [4.05, 5.28] | ≤0.001 |
| Free intraperitoneal fluid, % | 52.56 | 31.84 | ≤0.01 |
| Irregular appendix layers, % | 41.74 | 11.11 | 0.1 |
| Target sign, % | 67.37 | 9.10 | ≤0.001 |
| Appendix perfusion, % | 74.47 | 12.50 | ≤0.05 |
| Surrounding tissue reaction, % | 86.01 | 16.22 | ≤0.001 |
| Pathological lymph nodes, % | 62.20 | 74.70 | 0.8 |
| Mesenteric lymphadenitis, % | 79.69 | 81.08 | 1.0 |
| Thickening of the bowel wall, % | 55.77 | 19.44 | ≤0.05 |
| Ileus, % | 25.00 | 0.00 | 0.17 |
| Coprostasis, % | 34.15 | 42.42 | 1.0 |
| Meteorism, % | 59.18 | 84.48 | 0.1 |
| Enteritis, % | 16.67 | 69.57 | ≤0.05 |
Distributions of variables are presented as either medians with interquartile ranges (in square brackets) or percentages. For significant differences, p-values are reported in bold as “≤0.001,” “≤0.01” or “≤0.05” (at significance level α = 0.05).