Polish adaptation and validation of the hip disability and osteoarthritis outcome score (HOOS) in osteoarthritis patients undergoing total hip replacement

Table 3 Mean scores at test and retest follow-up, test-retest reliability and MDC values (n = 77)

HOOS subscales (number of items)	Mean HOOS score (SD)		ICC (95% CI)	SEM	Minimal detectable change (95% CI) in individuals	Minimal detectable change (95% CI) in group
HOOS subscales (number of items)	First follow-up assessment	Second follow-up assessment	ICC (95% CI)	SEM	Minimal detectable change (95% CI) in individuals	Minimal detectable change (95% CI) in group
THR, n = 77
Pain (10)	79.2 (19.4)	78.6 (21.6)	0.82 (0.72–0.88)	9.46	26.2	3.0
Symptoms (5)	78.2 (19.5)	78.4 (18.7)	0.92 (0.88–0.95)	5.41	15.0	1.7
ADL (17)	75.6 (21.2)	75.8 (21.1)	0.96 (0.94–0.97)	4.32	12.0	1.4
Sport/recreation (4)	56.5 (29.8)	57.8 (29.8)	0.91 (0.87–0.94)	8.82	24.4	2.8
QOL (4)	64.4 (24.4)	64.5 (23.0)	0.91 (0.87–0.94)	7.00	19.4	2.2

mean scores in the HOOS subscales (0 to 100, worst to best scale) are given at test (first follow-up) and retest (second follow-up) assessment one to 2 weeks apart. Test-retest reliability is presented as ICC values. MDC of HOOS subscales is presented for individuals and groups one year after primary THR
Abbreviations: MDC minimal detectable change, THR total hip replacement, ICC intraclass correlation coefficient, SEM standard error of measurement, CI confidence interval, ADL activities of daily living, QOL quality of life

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