TABLE 4.

Accuracy of Preoperative CT Impression Compared With Final Diagnosis: Agreement (Weighted κ)

CT Scan	κ	95% CI	n
Overall	0.54	0.44–0.64	282
Study location
Community	0.48	0.36–0.60	196
Children’s	0.69	0.54–0.85	86
Age, y
1–6	0.35	0.05–0.65	30
7–12	0.56	0.40–0.71	104
13–18	0.58	0.44–0.72	148
Weight category
Underweight/normal	0.58	0.46–0.70	169
Overweight	0.60	0.34–0.86	42
Obese	0.31	0.02–0.60	44
Gender
Female	0.60	0.47–0.74	120
Male	0.49	0.35–0.63	162