Table 4.

Paired T-test (group B).

Groups	Periodontal parameters	N	Mean	Std. deviation	Std. error mean	Mean difference	t-value	p-value
Pair 1	PI-0	30	2.57	0.50	0.09	1.47	11.00	<0.001
	PI-1	30	1.10	0.55	0.10
Pair 2	PI-1	30	1.10	0.55	0.10	0.27	2.28	0.03
	PI-2	30	0.83	0.46	0.08
Pair 3	PI-0	30	2.57	0.50	0.09	1.73	16.28	<0.001
	PI-2	30	0.83	0.46	0.08
Pair 4	GBI-0	30	2.47	0.51	0.09	1.57	11.09	<0.001
	GBI-1	30	0.90	0.61	0.11
Pair 5	GBI-1	30	0.90	0.61	0.11	0.37	3.61	0.001
	GBI-2	30	0.53	0.57	0.10
Pair 6	GBI-0	30	2.47	0.51	0.09	1.93	12.20	<0.001
	GBI-2	30	0.53	0.57	0.10
Pair 7	PD-0	30	5.57	0.90	0.16	2.17	14.99	<0.001
	PD-1	30	3.40	0.93	0.17
Pair 8	PD-1	30	3.40	0.93	0.17	0.90	6.92	<0.001
	PD-2	30	2.50	0.68	0.12
Pair 9	PD-0	30	5.57	0.90	0.16	3.07	22.71	<0.001
	PD-2	30	2.50	0.68	0.12
Pair 10	CAL-0	30	3.40	1.04	0.19	2.00	12.58	<0.001
	CAL-1	30	1.40	0.97	0.18
Pair 11	CAL-1	30	1.40	0.97	0.18	0.87	5.79	<0.001
	CAL-2	30	0.53	0.68	0.12
Pair 12	CAL-0	30	3.40	1.04	0.19	2.87	18.25	<0.001
	CAL-2	30	0.53	0.68	0.12

There is significant change in all the four variables viz. PI, GBI, PD and CAL at all the time points with p-value less than 0.01. Bold signifies P< 0.05.

PI, plaque index; GBI: Gingival bleeding index; PD, pocket depth; CAL, clinical attachment level.