Evaluation of the clinical efficacy of green tea extract gel as local drug delivery for periodontitis

Table 1 Intra-group comparison of baseline and 1-month values

		Intra group comparison					t	df	P value
		Mean difference	SD	SEM	95%CI of the difference
					Lower	Upper
OHI simplified	Baseline vs 1 month	1.62500	0.34774	0.07776	1.46225	1.78775	20.899	19	< 0.001a
Plaque index	Green tea	0.71250	0.25346	0.05667	0.59388	0.83112	12.572	19	< 0.001a
	Ornidazole gel	0.65750	0.23881	0.05340	0.54573	0.76927	12.313	19	< 0.001a
Probing pocket depth	Green tea	2.80000	0.70830	0.09144	2.61703	2.98297	30.621	59	< 0.001a
	Ornidazole gel	2.48333	0.77002	0.09941	2.28441	2.68225	24.981	59	< 0.001a
Clinical attachment level	Green tea	2.86667	0.81233	0.10487	2.65682	3.07651	27.335	59	< 0.001a
	Ornidazole gel	2.51667	0.77002	0.09941	2.31775	2.71559	25.316	59	< 0.001a

^aP < 0.05.

OHI: Oral hygiene index.

Table 2 Inter-group comparison of baseline value in variables used among green tea and ornidazole gel group

Baseline and 1 month	Inter-group comparison					t	df	P value
	Mean difference	SD	SEM	95%CI of the difference
				Lower	Upper
Plaque index	-0.14550	0.25591	0.05722	-0.26527	-0.02573	-2.543	19	0.020a
Probing pocket depth	0.03333	0.78041	0.10075	-0.16827	0.23493	0.331	59	0.742
Clinical attachment level	0.01667	0.83345	0.10760	-0.19864	0.23197	0.155	59	0.877

^aP < 0.05.

Table 3 Inter-group comparison of 1 month value in variables used among green tea and ornidazole gel group

Baseline and 1 month	Inter-group comparison					t	df	P value
	Mean difference	SD	SEM	95%CI of the difference
				Lower	Upper
Plaque index	-0.20050	0.28376	0.06345	-0.33330	-0.06770	-3.160	19	0.005a
Probing pocket depth	-0.28333	0.78312	0.10110	-0.48563	-0.08103	-2.802	59	0.007a
Clinical attachment level	-0.33333	0.79547	0.10269	-0.53882	-0.12784	-3.246	59	0.002a

^aP < 0.05.