Table 3.

Pearson correlation coefficients between the RMDQ questionnaires and the GPE and AUC for the RMDQ scales using the cut offs of 3, 2 and 4 on the GPE

	Correlation with GPE scale	AUC (cut off 3 or greater on GPE)	AUC (cut off 2 of greater on GPE)	AUC (cut off 4 or greater on GPE)
24-item version	0.49 (0.45–0.54)	0.78 (0.76–0.81)	0.79 (0.76–0.82)	0.74 (0.71–0.77)
18-item versiona	0.49 (0.44–0.53)	0.78 (0.75–0.81)	0.79 (0.76–0.82)	0.74 (0.71–0.77)
18-item versionb	0.49 (0.44–0.53)	0.78 (0.75–0.81)	0.79 (0.76–0.82)	0.74 (0.71–0.77)
11-item version	0.44 (0.39–0.49)	0.75 (0.72–0.78)	0.76 (0.73–0.79)	0.73 (0.70–0.77)

Numbers in brackets are 95% confidence intervals

^a18-item RMDQ version proposed by Williams and Myers [6]

^b18-item RMDQ version proposed by Stratford and Binkley [7]