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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)

From: Effectiveness of oral health education intervention among 12–15-year-old school children in Dharan, Nepal: a randomized controlled trial

  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