Table 5.

Outcomes of the sensitivity meta-regressions.

	Model R2	Mean effect size	N effect sizes included	Homogeneity Q	B	95% CI. LL, UL	p-value
A Pain
Intervention: duration [weeks]	.445	1.8	40	31	− .009	− .1, .08	.8
Intervention: frequency [NTrainings/week] data transformed from U-shaped association					.164	− .239, .567	.4
Intervention: Time per session [minutes] Data transfomed from negative log association					− 1.75	− 2.61, − .879	.0001
PEDro sum score [points]					− .17	− .36, .016	.07
Sample size (MCE)					.005	− .016, .026	.6

	Model R2	Mean effect size	N effect sizes included	Homogeneity Q	B	95% CI. LL, UL	p-value
B Disability
Intervention: duration [weeks]	.15	1.7	37	2	.1	− 0.3, 0.95	.3
Intervention: frequency [NTrainings/week] data transformed from U-shaped association					.26	− .61, 1.1	.6
Intervention: time per session [minutes] Data transfomed from negative log association					− 1.0	− 3.1, .95	.3
PEDro sum score [points]					− .04	− .37, .30	.8
Sample size (MCE)					− .003	− .06, .06	.9

For each single analysis, effect sizes, number of included effect sizes, homogeneity, the regression coefficient B, its confidence interval (CI) and the corresponding p-value are displayed. Legend: LL, lower level, UL, upper level.