Table 2.
Characteristics of the patients included in the study based on the diagnosis of appendicitis.
| All Patients (n=331) |
Appendicitis (n=116) |
No Appendicitis (n=215) |
p | |
|---|---|---|---|---|
| Demographic data | ||||
| Age (years); [mean (SD)] | 11.8 (3.8) | 11.1 (3.7) | 12.2 (3.8) | 0.013 |
| Male; [n (%)] | 175 (52.9) | 74 (63.8) | 101 (47.0) | 0.003 |
| Clinical data | ||||
| Time since symptom onset (hours); [n (%)] | <0.001 | |||
| 0-12 | 88 (26.6) | 19 (16.4) | 69 (32.1) | |
| 12-24 | 63 (19.0) | 30 (25.9) | 33 (15.3) | |
| 24-48 | 92 (27.8) | 42 (36.2) | 50 (23.3) | |
| 48 o more | 88 (26.6) | 25 (21.6) | 63 (29.3) | |
| Associated Symptoms; [n (%)] | ||||
| Periumbilical pain with migration to LRQ | 286 (86.4) | 104 (89.7) | 182 (84.7) | 0.205 |
| Anorexia | 110 (33.2) | 53 (45.7) | 57 (26.5) | <0.001 |
| Nausea | 165 (49.8) | 69 (59.5) | 96 (44.7) | 0.100 |
| Vomiting | 139 (42.0) | 65 (56.0) | 74 (34.4) | <0.001 |
| Physical Examination; [n (%)] | ||||
| Fever (37.8ºC) | 35 (10.6) | 15 (12.9) | 20 (9.3) | 0.306 |
| LRQ Tenderness | 290 (87.6) | 109 (94.0) | 181 (84.2) | 0.010 |
| Rebound tenderness | 190 (57.4) | 84 (72.9) | 106 (49.3) | <0.001 |
| Percussion tenderness | 200 (60.4) | 87 (75.0) | 113 (52.6) | <0.001 |
| Rigidity | 98 (29.6) | 52 (44.8) | 46 (21.4) | <0.001 |
| Rovsing sign | 53 (16.0) | 26 (22.4) | 27 (12.6) | 0.020 |
| Laboratory data | ||||
| White blood cell count (ml/mm3); [mean (SD)] | 11.7 (6.0) | 14.5 (4.7) | 10.2 (6.2) | <0.001 |
| Neutrophile (mil/mm3) | 8.5 (4.9) | 11.4 (4.7) | 6.9 (4.2) | <0.001 |
| C-reactive protein (mg/L); [median (IQR)] | 0.83 (0.29-4.08) | 3.02 (0.61-6.57) | 0.30 (0.19-1.96) | <0.001 |
| Alvarado Score; [n (%)] | ||||
| Low-risk | 108 (32.6) | 11 (9.5) | 97 (45.1) | <0.001 |
| Intermediate-risk | 76 (23.0) | 18 (15.5) | 58 (27.0) | |
| High-risk | 147 (44.4) | 87 (75.0) | 60 (25.9) | |
| Imaging data | ||||
| US; [n (%)] | 172 (52.0) | 58 (50.0) | 114 (53.0) | 0.599 |
| CT; [n (%)] | 6 (1.8) | 3 (2.6) | 3 (1.4) | 0.438 |
| US and CT; [n (%)] | 11 (3.3) | 5 (4.3) | 6 (2.8) | 0.462 |
| No imaging; [n (%)] | 189 (57.1) | 66 (56.9) | 123 (57.2) | 0.956 |
| Treatment data | ||||
| Surgery; [n (%)] | 118 (35.6) | 109 (94.0) | 9 (4.2) | <0.001 |
SD: standard deviation; LRQ: lower right quadrant; IQR: interquartile range; US: ultrasound; CT: computerized tomography