Table 5.

Multivariate regression analyses of demographic¹ and CT² data

Characteristics	Adjusted OR (95%CI)	P value
Age ≥ 50 years	1.67 (0.86–3.24)	0.132
Symptoms and signs
Temperature ≥ 37 °C	1.85 (0.90–3.77)	0.093
Lack of pain migration	2.06 (1.03–4.13)	0.040
Anorexia	1.25 (0.61–2.57)	0.539
Laboratory results
Neutrophilia ≥ 82%	2.87 (1.42–5.81)	0.003
Alvarado score
0–4	1
5–8	0.83 (0.25–2.77)	0.757
9–10	1.90 (0.33–10.95)	0.473
Duration of symptom ≥ 24 h	5.84 (2.86–11.96)	< 0.001
CT findings
Appendiceal diameter > 12 mm	1.47 (0.58–3.72)	0.417
Tip appendiceal diameter > 10 mm	1.18 (0.46–3.00)	0.728
Mucosal enhancement defect	4.62 (1.86–11.51)	0.001
Intraluminal appendicolith	1.64 (0.39–6.85)	0.499
Appendicolith causing obstruction	0.78 (0.16–3.71)	0.751
Fat stranding; moderate–severe	4.41 (1.06–18.29)	0.041
Fluid collection	4.45 (0.49–40.74)	0.187
Periappendiceal fluid	1.22 (0.47–3.20)	0.687
Ascites	1.98 (0.73–5.40)	0.182
Small bowel dilatation	1.31 (0.19–8.93)	0.786
Small bowel thickening	1.20 (0.45–3.16)	0.720

¹Nagelkerke R² = 0.336; overall accuracy 73.1%

²Nagelkerke R² = 0.563; overall accuracy = 79.5%