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

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

A) participant-reported global improvement	Spearman’s rho	95% CI	p-value compared to PRWHE pain^a
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

^a P-value from a test comparing the Spearman’s rho or Pearson’s correlation co-efficient between the measures [20]

ISSN: 1471-2288