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Table 2 Correlations among measures of health status and the YPAS scores in the combined preoperative and follow-up samples (Spearman’s correlation coefficient)

From: Development and validation of a Spanish translation of the Yale activity questionnaire

  YPAS Part 1 YPAS Part II
  Energy expenditure index Activity dimensions summary index Total minutes vigorous activity and walking
WOMAC function, r -0.07 -0.21 -0.15
(p-value) (0.49) (0.03) (0.15)
SF-36 physical activity, r 0.03 0.29 0.21
(p-value) (0.74) (0.004) (0.04)
EQ-5D utility, r 0.18 0.34 0.24
(p-value) (0.07) (0.0007) (0.02)
  1. WOMAC = Western Ontario Osteoarthritis Index.