Impact of the use and efficacy of long lasting insecticidal net on malaria infection during the first trimester of pregnancy - a pre-conceptional cohort study in southern Benin

Table 4 Factors associated with the time to onset of the first malaria infection during the first trimester of pregnancy (multivariate Cox model, N = 190 pregnant women); Sô-Ava and Akassato, Benin 2015–2016

Variables (terms)		Multivariatble Cox model
Variables (terms)		N	HRa	CI 95%	pvalue
Use of LLIN by the woman the week before the visit		190
	No	36	1
	Yes	154	0.38	(0.18–0.80)	< 0.001
Physical integrity of the pregnant woman’s LLIN		190
	Bad	78	1
	Good	112	0.59	(0.29–1.19)	0.07
Quantitative bio-efficacy^a of the pregnant woman’s LLIN		190	0.97	(0.94–1.00)	0.04
Malaria before pregnancy		190
	Yes	9	1
	No	181	0.27	(0.09–0.74)	0.01

N Total, HRa Hazard ratio adjusted, CI 95% Confidence Interval at 95%, LLIN Long Lasting Impregnated bedNets, pvalue one-sided pvalue
^aQuantitative bio-efficacy is defined as the proportion of female anopheles who died 24 h after exposure to the LLIN

ISSN: 1471-2458