Table 3A.

Meta‐analysis for single‐brushing design studies for the Modified Silness and Löe plaque index ²⁴ , ²⁵ , ²⁶ using a random model

Single‐brushing design Modified Silness and Löe plaque index 24 , 25 , 26	Number of studies	Number of comparisons	Comparison	Effect size			Heterogeneity		Online appendix number
				DiffM	95% CI	P‐value	I 2	P‐value	Forrest plot	Funnel plot	Trial sequential analysis
Professional brushing Van der Weijden et al (1996) 45 1 min Van der Weijden et al (1996) 45 2 min Van der Weijden et al (1996) 45 3 min Van der Weijden et al (1996) 45 4 min Van der Weijden et al (1996) 46	1	9	Baseline	−0.01	(−0.05; 0.03)	.61	0%	.99	S4C	NA	NA
			End	0.19	(0.13; 0.25)	<.0001	0%	.94	S4B	NA	S4C
			Difference	?
Participant brushing Van der Weijden et al (1996) 45 1 min Van der Weijden et al (1996) 45 2 min Van der Weijden et al (1996) 45 3 min Van der Weijden et al (1996) 45 4 min	1	8	Baseline	0.02	(−0.01; 0.05)	.32	0%	.98	S4A	NA	NA
			End	0.06	(−0.02; 0.14)	.15	0%	.97	S4B	NA	S4D
			Difference	?

P‐values are presented in bold if P ≤ .05.

Abbreviations: ?, unclear; NA, not applicable.