Table 5.

Comparison of mean plaque scores and gingival scores at different time intervals using post hoc Tukey’s test among a sample of 12–15-year-old students in Nepal (N = 202)

	Time intervals		Mean difference ± SE	P value	95% confidence interval
					Lower bound	Upper bound
Plaque scores in experimental group	Baseline	3 months	0.71 ± 0.05	< 0.001	0.60	0.82
		6 months	1.24 ± 0.05	< 0.001	1.13	1.34
	3 months	6 months	0.52 ± 0.05	< 0.001	0.42	0.63
Plaque scores in Control group	Baseline	3 months	− 0.04 ± 0.05	0.36	− 0.15	0.05
		6 months	0.101 ± 0.05	0.06	− 0.006	0.20
	3 months	6 months	0.073 ± 0.03	0.02	0.007	0.13
Gingival scores in experimental group	Baseline	3 months	0.46 ± 0.02	< 0.001	0.40	0.52
		6 months	0.53 ± 0.02	< 0.001	0.48	0.59
	3 months	6 months	0.07 ± 0.03	0.02	0.007	0.13