Table 3. Patient number and predictive values for detection of any cartilage invasion vs no invasion.

	Pathology any invasion	Pathology no invasion	PPV (%) (95% CI)	NPV (%) (95% CI)	Sens (%) (95% CI)	Spec (%) (95% CI)
CT scan any invasion	17	10	63 (42–80)	92 (75–98)	85 (61–96)	75 (59–87)
CT scan no invasion	3	31

PPV, positive predictive value; NPV, negative predictive value; Sens, sensitivity; Spec, specificity; CI, confidence interval.