Examiner calibration
non-bleeding, PD, bleeding
BLEEDING
Calibration was performed to determine the intra-examiner (Y.L.A.S.L.) reproducibility and the kappa coefficient was 93%. Ten patients (with both bleeding and non-bleeding sites upon probing) not related to this study were selected. PD, GI, and BoP were assessed using a manual periodontal probe (PCPUNC156; Hu-Friedy, Chicago, IL, USA). Each patient was evaluated on two separate occasions 48 h apart in order to obtain the intra-examiner reliability.