Examiner alignment and assessment
tooth
RECRUITMENT
During examiner alignment, both examiners (M.S. and O.A.) and a research nurse (S.S.) were instructed and coached in the proper use of the outcome measurements (GI, BoP, and PI), before participant recruitment to the trial [A clinical assessment study to assess intra-examiner reproducibility of the measurements, was performed on 20 randomly selected participants. PI, GI, and BoP were recorded, at six sites per tooth, (described above), at the same visit with a 30-min interval. A weighted concordance Kappa’s index was performed to assess agreement between repeated measurements. Concordance of measurements was found to be good for GI (0.758, 95% CI 0.739–0.778) and BoP (0.77, 95% CI 0.753–0.796) and very good for PI (0.845, 95% CI 0.829–0.862).