Appendix 4.

Univariate models for all explored variables.

Study Methodology Related Factors
								95%CI
Variables	n	τ2	Adj. R2	β	SE	t	p	LB	UP
Use of intention-to-treat analysis	22	2.53	8.14	0.30	0.91	0.33	0.75	−1.60	2.19
Size of active intervention group	26	2.05	6.87	0.00	0.04	−0.09	0.93	−0.08	0.07
Size of sham intervention group	26	2.05	6.72	0.00	0.05	0.09	0.93	−0.09	0.10
# of Dropouts in active intervention group	22	2.40	1.88	0.19	0.22	−0.86	0.40	−0.64	0.27
# of Dropouts in sham intervention group	22	2.41	2.48	−0.18	0.21	−0.82	0.42	−0.62	0.27
Dropout % in active intervention group	24	2.04	1.79	−0.05	0.05	−1.02	0.32	−0.15	0.05
Dropout % in sham intervention group	24	2.11	1.54	−0.04	0.05	−0.85	0.41	−0.14	0.06
Blinding of participants	26	2.05	6.89	0.13	1.64	0.08	0.94	−3.24	3.52
Blinding of intervention staff	26	1.93	0.47	1.58	1.66	0.95	0.35	−1.85	5.02