Table 4.

Group differences for group-independent effects of yoga according to frequency of visited yoga classes compared to controls, mean (95% CI).

	7–12 versus 0 yoga classes		13–24 versus 0 yoga classes*
	Change	P value	Change	P value
Back pain	−2.3 (−3.7; −1.0)	0.001	−3.5 (−5.5; −1.5)	0.001
GSI-Score	−8.5 (−13.9; −3.0)	0.003	−10.2 (−15.9; −4.4)	0.001
CES-D	−4.5 (−8.3; −0.6)	0.049	−5.9 (−10.5; −1.3)	0.011
S-STAI	−6.5 (−12.0; −1.0)	0.02	−7.4 (−13.4; −1.4)	0.015
T-STAI	−6.1 (−10.5; −1.7)	0.006	−6.5 (−11.2; −1.8)	0.007

GSI: General Severity Index; CES-D: Center for Epidemiological Studies Depression Scale; S-STAI: state anxiety; T-STAI: Trait Anxiety.

*Group differences between 7–12 and 13–24 classes not significant.