Table 2.

Threshold values for univariate and multivariate analysis

PROM	Thresholds	AUC	Sensitivity	Specificity	p value
KOOS	< 58	0.76 (0.03)	73% (4%)	69% (4%)	< 0.001
SF12v2 PCS	< 34	0.65 (0.04)	66% (4%)	56% (5%)	< 0.001
Multivariate SF12v2 MCS/KOOS*	See Fig. 2A	0.80	82%	63%	0.004
Multivariate SF12v2 MCS/SF12v2 PCS*	See Fig. 2B	0.71	64%	69%	< 0.001

^*Also controlled for gender, age, race; 95% confidence intervals reported in parentheses; PROM = patient-reported outcome measure; AUC = area under the curve; KOOS = Knee injury and Osteoarthritis Outcome Score; SF12v2 = SF-12 version 2; PCS = physical component summary; MCS = mental component summary.