Skip to main content

Table 3 Clinical variables (mean ± standard deviation) of probing pocket depth (PPD) and clinical attachment level (CAL) at baseline (T0), 6 weeks after baseline (T1), and 12 weeks after baseline (T2) (sites of PPD≥ 4mm at baseline)

From: The effect of (-)-epigallocatechin gallate as an adjunct to non-surgical periodontal treatment: a randomized clinical trial

  Mean ± standard deviation Between-group p value Intra-group p value
T0 T1 T2 Comparison of slopes T0 vs T1
T0 vs T2
PPD (mm) Test 5.30 ± 1.27 4.04 ± 1.35 3.57 ± 1.30 p =0.680 p <0.001*
p <0.001*
Control 5.19 ± 1.23 4.02 ± 1.21 3.57 ± 1.08 p <0.001*
p <0.001*
Comparison
2 groups at time point
  p =0.181 p =0.888 p =0.960   
CAL (mm) Test 5.45 ± 2.02 4.41 ± 1.86 3.71 ± 2.01 p =0.918 p <0.001*
p <0.001*
Control 5.35 ± 1.89 4.45 ± 1.72 3.77 ± 1.87 p <0.001*
p <0.001*
Comparison
2 groups at time point
  p =0.448 p =0.798 p =0.672   
  1. Repeated measures analysis of variance test was used in the between-group comparison of slopes. Multivariate analysis of variance was used in between-group comparison at each time point. Paired-sample t test was used in the intra-group comparison
  2. *p <0.05