Table 2. AUC, cut-off values, sensitivity, and specificity of patellar proximodistal alignment parameters.

Index	AUC	Cut-off value	Cut-off sensitivity	Cut-off specificity
ISI	0.628*	≤1.98	60.56	69.12
BPI	0.569	≤1.14	65.80	52.90
CDI	0.543	>1.56	27.50	94.12

^*p < 0.01.