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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Dental state: Average score (modified Quigley‐Hein Plaque Index, high score = bad) | 1 | 40 | Mean Difference (IV, Random, 95% CI) | ‐0.5 [‐0.62, ‐0.38] |
| 2 Leaving the study early | 1 | 50 | Risk Ratio (M‐H, Random, 95% CI) | 1.67 [0.45, 6.24] |
