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Table 2 Longitudinal validity (correlations between different pain measures and anchor measures)

From: Responsiveness of different pain measures and recall periods in people undergoing surgery after a period of splinting for basal thumb joint osteoarthritis

A) participant-reported global improvement Spearman’s rho 95% CI p-value compared to
PRWHE paina
PRWHE pain subscale 0.71 0.64 to 0.78 ref
Pain NRS, past day 0.55 0.45 to 0.64 p < 0.001
Pain NRS, past week 0.62 0.54 to 0.70 p = 0.004
Pain NRS, past month 0.59 0.50 to 0.68 p < 0.001
B) PRWHE function subscale Pearson’s correlation coefficient 95% CI p-value compared to
PRWHE pain
PRWHE pain subscale 0.78 0.73 to 0.83 ref
Pain NRS, past day 0.68 0.60 to 0.75 p < 0.001
Pain NRS, past week 0.73 0.66 to 0.78 p = 0.017
Pain NRS, past month 0.69 0.63 to 0.79 p = 0.020
  1. a P-value from a test comparing the Spearman’s rho or Pearson’s correlation co-efficient between the measures [20]