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 1 Demographics of patients (n = 2226)

Patient characteristics	n	Percent	Mean (SD)	Range
Age (yr)			61.16 (12.84)	18-93
Gender
Male	927	41.6
Female	1299	58.4
Race
White or Caucasian	1997	89.7
Black or African
American 27	1.2
Asian	20	0.9
American Indian and Alaska Native	32	1.4
Native Hawaiian or Pacific Islander	11	0.5
Other	113	5.1
Unknown/missing	26	1.2
Ethnicity
Hispanic	114	5.1
Non-Hispanic	2075	93.2
Missing	37	1.7