Numbers analysed for each outcome
Bleeding, trauma
BLEEDING, PLAQUE
The analysis was performed on an intention-to-treat basis. This means that all patients who were randomised to receive an intervention were included in the analysis, regardless of whether they completed the trial (The results for PI, GI and IBI are shown in Difference of each outcome between control and treatment group using generalised linear mixed model.CI, confidence interval; GI, Gingival Index; IBI, Interdental Bleeding Index; OMPI, Orthodontic Modification of Plaque Index.The mean OMPI at each interval with 95% confidence interval (CI) error bars is shown in Mean OMPI at each time interval with 95% CI error bars. Baseline OMPI is not shown, as baseline indices were recorded before fitting appliances. The OMPI requires appliances to be in situ to be recorded.CI, confidence interval; OMPI, Orthodontic Modification of Plaque Index.The mean GI at each interval with 95% CI error bars is shown in Mean GI at each time interval with 95% CI error bars.CI, confidence interval; GI, Gingival Index.The mean IBI at each interval with 95% error bars is shown in Mean IBI at each time interval with 95% CI error bars.The ICC for OMPI was 0.911 (95% CI 0.700–0.977), demonstrating good evidence for the repeatability of measurements of OMPI.No participant had trauma detected at any visit in either group.