Table 2.

Correlations at Baseline and 3 Months Among the Pain Scales in INCPAD^*

Pain Scale	BPI Total	BPI Severity	BPI Interference	PEG	SF-36 Pain
BPI total	—	.76	.96	.93	−.64
		.87	.97	.97	−.81
BPI severity		—	.55	.69	−.42
			.71	.81	−.71
BPI interference			—	.90	−.63
				.95	−.76
PEG				—	−.63
					−.75
SF-36 pain					—

NOTE. The first correlation for each measure is the baseline correlation, and the second correlation is the 3-month correlation.

^*All correlations are significant at P < .0001.