Establishing the extent of malaria transmission and challenges facing pre-elimination in the Republic of Djibouti

BMC Infectious Diseases

Table 3 Multivariate regression results of the predictors of combined P. falciparum antibody exposure and/or infection prevalence shown as cluster-adjusted and weighted Odds Ratio (95%CI) and P-value of the start full model and final reduced model.

	Start Full model		Final reduced model
	Odds Ratio (95% CI)	P-value	Odds Ratio (95% CI)	P-value
Age category ^a	1.4 (1.2 - 1.6)	0.0001	1.4 (1.2 - 1.6)	0.0001
Urban vs Rural	0.9 (0.4 - 1.7)	0.660
ITN use vs not used	1.0 (0.6 - 1.6)	0.996
Fever in last 14 days Yes vs No	0.9 (0.6 - 1.5)	0.792
Cluster located in arid area Yes vs No	1.4 (0.8 - 2.4)	0.214
≤0.5 km vs >0.5 km to main road/rail ^c	0.9 (0.5 - 1.5)	0.631
≤7 km vs > 7 km to the coast line ^c	0.8 (0.5 - 1.3)	0.406
Travelled anywhere in the last 6 months yes vs no ^c	1.1 (0.7 - 1.8)	0.361
Wealth quintile ^b	0.7 (0.6 - 0.8)	0.0001	0.8 (0.7 - 0.9)	0.0001

At each stage of the regression a predictor variable (one with the highest non-significant P-value) was removed from the model in a backwards step-wise approach until all variables in the model had a P-value of less than 0.05.
^a The age grouping shown in Table 1 was used during the regression. 14 individuals had missing age data.
^b Individuals were classified into the wealth quintile of their resident household.
^c Median distances were used

ISSN: 1471-2334