Table 2.

Comparison of mean gingival index scores between different time intervals in control group using Friedman’s test

Group	Time	n	Mean±SD	Minimum	Maximum	P
Group 1	Before	30	0.40±0.17	0.10	0.70	0.015*
	7 days	30	0.42±0.11	0.15	0.75
	30 days	30	0.41±0.18	0.10	0.75
	6 months	30	0.40±0.17	0.10	0.70

*Statistically significant at P<0.05. Group 1 – Control; SD – Standard deviation; n – Number of subjects; P – Probability value