Comparing Yoga, Exercise, and a Self-Care Book for Chronic Low Back Pain

Figure 3. Classes ended at week 12. The x-axis signifies week after starting treatment. Higher scores signify greater symptom
bothersomeness. The values for the omnibus tests of any differences in mean symptom bothersomeness scores among the 3 treatment
groups (derived from a linear regression model fitted to all follow-up time points, adjusting for baseline symptom bothersomeness
score by using generalized estimating equations) are 0.019 at 6 weeks, 0.135 at 12 weeks, and 0.001 at 26 weeks.
Mean symptom bothersomeness scale scores at baseline, 6, 12, and 26 weeks by treatment group.PF
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Ann Intern Med
December 20, 2005
vol. 143
no. 12
849-856