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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Tooth whitening ‐ assessed by the dentist | 1 | Risk Ratio (M‐H, Random, 95% CI) | Subtotals only | |
| 1.1 10% CP tray versus 10% CP tray ‐ 2 weeks | 1 | 66 | Risk Ratio (M‐H, Random, 95% CI) | 1.03 [0.90, 1.18] |
