Table 5.

An ROC analysis of the empty bone and stem-to-stem distance of patients

Test result variable	Cutoff value, cm	Sensitivity, %	Specificity, %	AUC	95% CI AUC	p value
Empty native bone distance	7.0	72	75	0.78	0.67 to 0.89	0.001
Stem-to-stem distance	9.0	74	70	0.75	0.64 to 0.87	0.001

ROC = receiver operating characteristic; AUC = area under the curve.