Table 2.

Primary Outcomes for the Patient Education and Placebo Patient Education Groups at 1 Week and 3, 6, and 12 Months

Variable	Point Estimates, Mean (SD)		Mean Difference (95% CI)	P Value
	Patient Education	Placebo Patient Education
Pain intensity during the past week
1 wk	3.2 (2.4)	3.1 (2.2)	0.1 (−0.5 to 0.8)	.69
3 mo	2.1 (2.4)	2.4 (2.2)	−0.3 (−1.0 to 0.3)	.31
6 mo	2.3 (2.6)	2.5 (2.3)	−0.2 (−0.8 to 0.5)	.59
12 mo	1.8 (2.2)	2.5 (2.4)	−0.6 (−1.3 to 0.1)	.07
Overall intervention effecta	NA	NA	NA	.26

Abbreviation: NA, not applicable.

^aP value is from mixed models for repeated measures comparing between-group difference during the full 12-month trial, controlling for baseline and including time points as a categorical variable.