Table 3.

Comparison of means and standard deviations of clinical attachment level (mm) among the study groups at different time intervals (months)

Groups	Baseline	After 6m	After 12m	P#
Control	0.75±1.83	0.54±1	0.54±1	0.001
LW chitosan	0.37±1.41	0.64±1.2	0.49±0.91	0.022
HW chitosan	0.6±1.83	0.31±1	0.33±0.95	0.029
P$	0.402	0.730	0.953	0.161*

m: months; LW: low-weight; HW: high-weight

^#: repeated measures ANOVA;

^$: one-way ANOVA;

^* the result of comparison of the interaction effect of time and treatment on pocket depth using repeated measures ANOVA