Table 4.

Estimate effect comparing helminth infection among pupils in schools that received hygiene promotion, sanitation, safe water treatment provision compared with control schools for each follow-up round in Nyanza Province, Kenya 2007–2009

Variable	A. lumbricoides			T. trichiura			Hookworm			S. mansoni
	Estimate	95% CI	P	Estimate	95% CI	P	Estimate	95% CI	P	Estimate	95% CI	P
Prevalence	OR			OR			OR			OR
Follow-up 1	0.68	0.41–1.14	0.14	0.74	0.32–1.68	0.47	0.52	0.27–1.00	0.05	1.05	0.44–2.52	0.90
Follow-up 2	0.48	0.22–1.06	0.07	0.86	0.46–1.63	0.65	1.27	0.71–2.23	0.41	1.52	0.39–5.95	0.54
Egg count	RR			RR			RR			RR
Follow-up 1	0.38	0.14–1.02	0.06	1.22	0.44–3.34	0.69	0.77	0.31–1.91	0.57	1.04	0.37–2.96	0.93
Follow-up 2	0.32	0.12–0.82	0.02	0.35	0.12–1.04	0.06	0.48	0.15–1.48	0.19	0.47	0.13–1.64	0.23

OR = odds ratio; RR = rate ratio. Models controlled for school-aggregated baseline egg counts.