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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.

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

  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
  1. 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.
  2. a The age grouping shown in Table 1 was used during the regression. 14 individuals had missing age data.
  3. b Individuals were classified into the wealth quintile of their resident household.
  4. c Median distances were used