Table 5.

Comparison of discrimination for the combination model and each independent predictor for quadriceps strength recovery

The combination model	NRI (95% CI)	p value	IDI (95% CI)	p value
vs. Age	0.606 (0.453–0.759)	< 0.001	0.096 (0.072–0.120)	< 0.001
vs. Sex	0.653 (0.500–0.805)	< 0.001	0.142 (0.113–0.170)	< 0.001
vs. Body mass index	0.671 (0.519–0.822)	< 0.001	0.131 (0.103–0.158)	< 0.001
vs. Preinjury sport level	0.544 (0.389–0.699)	< 0.001	0.105 (0.080–0.129)	< 0.001
vs. LSI of quadriceps strength	0.492 (0.336–0.648)	< 0.001	0.060 (0.040–0.080)	< 0.001

The combination model consisted of age, sex, body mass index, preinjury sport level, and LSI of quadriceps strength

NRI net reclassification improvement, IDI integrated discrimination improvement, LSI limb symmetry index