Fig. 7

2f Forest plot for meta-analysis of the post-intervention mean plaque scores of Salvadora persica compared to chlorhexidine (sub-grouped according to risk of bias assessment); (2.1) high quality studies (2.2) moderate quality studies. 2g Forest plot for meta-analysis of the post-intervention mean plaque scores of Salvadora persica compared to chlorhexidine (subgrouped according to duration); (2.1) duration of < 3 weeks and (2.2) duration of ≥3 weeks. [SP Salvadora persica, CHX chlorhexidine, **: significant difference at p = 0.05]