Reliability and validity of the short questionnaire to assess health-enhancing physical activity (SQUASH) in patients after total hip arthroplasty

Table 3 Results of the Bland & Altman method for validity of the SQUASH

	SQUASH-1 (n = 39)	Actigraph™ (n = 39)	d	SE d	95% CI
Total	1741 ± 1227	661 ± 475	1060 ± 1052	168	720 – 1400
Low intensity	898 ± 797	530 ± 337	237 ± 784	126	-17 – 491
Moderate intensity	475 ± 651	125 ± 161	238 ± 501	80	76 – 400
Vigorous intensity	368 ± 332	4 ± 9	302 ± 317	51	199 – 405

All times are expressed as minutes of activity per week (mean ± SD).
d = mean difference between time spent in physical activity as assessed by the first administered SQUASH (SQUASH-1) and the Actigraph™.
SE d = standard error of the mean difference.
95% CI = 95% confidence interval of the mean difference between the two measurements.

ISSN: 1471-2474