Table 3.

Prevalence and intensity comparisons between study years in community wide treatment and school based treatment arms.

Study group	Years compared	Study arm	Individual arms compared	PR (95% CI)	P value	AMR (95% CI)	P value
9–12 years	2012 vs. 2011	CWT	1, 2, 3 vs. 1, 2, 3	0.85 (0.80–0.90)	<0.001	0.90 (0.78–1.03)	0.12
		SBT	4, 5 vs. 4, 5, 6	0.71 (0.66–0.78)	<0.001	0.46 (0.41–0.52)	< 0.001
	2013 vs. 2011	CWT	1 vs. 1, 2, 3	0.77 (0.67–0.88)	<0.001	0.77 (0.62–0.94)	0.01
		SBT	4 vs. 4, 5, 6	0.56 (0.47–0.67)	<0.001	0.37 (0.27–0.51)	< 0.001
	2013 vs. 2012	CWT	1 vs. 1, 2, 3	0.84 (0.76–0.93)	<0.001	0.77 (0.62–0.95)	0.01
		SBT	4 vs. 4, 5	0.88 (0.75–1.03)	0.12	0.83 (0.57–1.22)	0.35
First year students	2013 vs. 2011	CWT	1 vs. 1, 2, 3	0.61 (0.47–0.79)	<0.001	0.60 (0.41–0.89)	0.01
		SBT	4 vs. 4, 5, 6	0.65 (0.48–0.87)	0.004	0.79 (0.34–1.82)	0.58
Adults	2013 vs. 2011	CWT	1 vs. 1, 2, 3	0.37 (0.28–0.47)	<0.001	0.42 (0.26–0.67)	<0.001

PR, prevalence ratio; AMR, arithmetic mean ratio; CI, confidence interval.