1. Data imputed.
| Study ID | Outcome | Data imputed from | Mean/median (intervention arm) | SD | IQR (from graph) | Mean/median (control arm) | SD | IQR (from graph) | Statistical test used for comparison |
| Desarda 2014 (RCT ‐ split mouth) | Less than 1 ft | Graph | 12.5 | 3.5 | ‐‐ | 13.5 | 5.75 | ‐‐ | Student t test |
| More than 1 ft | 11.5 | 4.5 | ‐‐ | 12.5 | 5.5 | ‐‐ | |||
| Devker 2012 (RCT ‐ split mouth) | Less than 1 ft | SD calculated from mean and P value of 0.01 | 18.13 | 176.41 | ‐‐ | 107.13 | 176.41 | ‐‐ | Paired t test |
| More than 1 ft | 7.3 | 26.88 | ‐‐ | 20.86 | 26.88 | ‐‐ | |||
| Hallier 2010 (CCT ‐ split‐mouth design) | Cavity preparation | IQR is imputed from the graph. SD = IQR/1.35 (6.5.2.5, Higgins 2019) |
38.4 | 10.2 (imputed) | 34.5 48.3 |
105.1 | 37.19 (imputed) | 82.8 133 |
Wilcoxon signed rank test |
| Ultrasonic scaling | 38.5 | 6.15 (imputed) | 36 44.3 |
70.9 | 12.37 (imputed) | 62.1 78.8 |
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| Williams 1970 (CCT ‐ split mouth) | At 30 inches (approx 76 cm) from floor using Reynier slit sampler | Borrowed 80.67 and 2.6 from Larato 1967 and multiplied with the ratio of the outcomes in both studies to get an SD related to the size of the effect | 0.6* (*calculated from the data given in table 1 of the article) | 239.8 (imputed) | ‐‐ | 319.74* | 239.8 (imputed) | ‐‐ | ‐‐ |
| At 8 to 12 inches (20 to 30 cm) from participant's mouth using Andersen sampler | 2.04* | ‐‐ | 485.6* | ‐‐ | ‐‐ |