Trends of Plasmodium falciparum prevalence in two communities of Muheza district North-eastern Tanzania: correlation between parasite prevalence, malaria interventions and rainfall in the context of re-emergence of malaria after two decades of progressively declining transmission

Table 1 Results from a Poisson regression model showing association between the risk of Plasmodium falciparum infections and rainfall anomaly adjusted for other factors

Variable	Risk ratio	95% CI	P > z
Rainfall anomaly: positive anomaly	2.793	(2.227–3.504)	< 0.001
Year of survey
1999	1
2000	1.208	(1.070–1.365)	0.002
2001	1.003	(0.858–1.173)	0.970
2004	0.626	(0.544–0.720)	< 0.001
2008	0.707	(0.595–0.841)	< 0.001
2009	0.549	(0.443–0.681)	< 0.001
2010	0.240	(0.177–0.327)	< 0.001
2011	0.096	(0.068–0.135)	< 0.001
2012	0.099	(0.082–0.121)	< 0.001
2013	0.072	(0.063–0.083)	< 0.001
2014	0.211	(0.167–0.266)	< 0.001
2015	0.233	(0.195–0.278)	< 0.001
Bed net ownership: no bed nets	1.350	(1.221–1.493)	< 0.001
Village: Mpapayu	0.849	(0.771– 0.936)	0.001

ISSN: 1475-2875