Establishing minimum clinically important difference values for the Patient-Reported Outcomes Measurement Information System Physical Function, hip disability and osteoarthritis outcome score for joint reconstruction, and knee injury and osteoarthritis outcome score for joint reconstruction in orthopaedics

Table 3 Distribution-based methods for minimum clinically important difference determination of the PROMIS PF CAT, HOOS JR and KOOS JRKOOS JR

Instrument	n	SD		MDC
		1/2	1/3	90%	95%	99%
3-mo from baseline follow-up
PF CAT	663	3.68	2.45	11.64	14.14	18.47
HOOS JR	99	5.86	3.9	17.54	20.84	27.22
KOOS JR	129	6.52	4.35	24.49	29.09	37.99
> 3-mo from baseline follow-up
PF CAT	2133	4.02	2.68	12.47	14.82	19.35
HOOS JR	245	9.33	6.22	28.11	33.39	43.61
KOOS JR	365	8.02	5.34	26.21	31.14	40.67
6-mo from baseline follow-up
PF CAT	264	3.93	2.62	13.89	16.5	21.55
HOOS JR	31	10.96	7.3	26.36	31.31	40.89
KOOS JR	55	5.96	3.98	20.84	24.75	32.33
> 6-mo from baseline follow-up
PF CAT	1520	4.35	2.9	13.46	15.98	20.88
HOOS JR	112	10.73	7.15	28.86	31.9	41.67
KOOS JR	154	7.12	4.75	22.91	27.22	35.55

MDC: Minimum detectable change.