Table 4.

KOOS JR^a MCID, overall and stratified by covariates

	Sample size	MCID (95% CI)	AUROCb
Overall	682	16 (14 to 18)	0.75
Age younger than 65 years	162	16 (12 to 24)	0.74
Age older than 65 years	520	16 (9 to 25)	0.75
BMI < 30 kg/m2	363	16 (7 to 18)	0.75
BMI ≥ 30 kg/m2	318	16 (14 to 25)	0.75
Men	289	17 (9 to 21)	0.81
Women	393	16 (14 to 26)	0.71
Preoperative PROMIS-10 PCS < 50c	573	16 (14 to 22)	0.76
Preoperative PROMIS-10 PCS ≥ 50	99	-7 (-9 to 22)	0.74
Preoperative PROMIS-10 MCS < 50c	290	16 (10 to 25)	0.72
Preoperative PROMIS-10 MCS ≥ 50	382	15 (8 to 24)	0.79

^aThe KOOS JR is scored from 0 to 100, where 0 represents total knee disability and 100 represents perfect knee health.

^bAUROC between 0.7 and 0.8 is considered acceptable, and between 0.8 and 0.9 is considered excellent.

^cA score of 50 represents the mean of the general population, and higher scores indicate better physical or mental health. AUROC = area under the receiver operating curve; PROMIS = Patient-Reported Outcome Measurement Information System; PCS = physical component score; MCS = mental component score.