Table 2.

Correlation of the mean gingival index scores, mean CAL scores, and mean OHI scores before and after nonsurgical periodontal therapy.

	N	Mean	SD	t	P
GI
Pre	27	1.51	0.19	19.361	<0.001
Post	27	0.75	0.21
CAL
Pre	27	5.08	0.47	16.443	<0.001
Post	27	4.24	0.40
OHI
Pre	27	3.00	0.51	24.746	<0.001
Post	27	0.39	0.23

N denotes the no. of sample subjects, SD: standard deviation, t-student t test and P value-power of significance.