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Table 3 Association between house finishing/facilities/ownership continuous scores and clinical malaria among children under 5 years of age in Blantyre, Malawi, sampled between April 2012 and October 2015

From: Patterns and determinants of malaria risk in urban and peri-urban areas of Blantyre, Malawi

Score estimated by PCA analysis* Overall OR
(95% CI)
Stratified OR (95% CI) OR Diff. P value Peri-urban vs. urban
Peri-urban Urban
House finishing/piped water (PC1) 0.78 (0.63, 0.91) 0.74 (0.60, 0.91) 0.76 (0.55, 1.06) 0.87
House ownership/finished walls (PC2) 0.84 (0.68, 1.06) 0.87 (0.65, 1.17) 0.53 (0.56, 1.14) 0.72
Toilet in house (PC3) 1.09 (0.89, 1.32) 0.93 (0.70, 1.22) 1.36 (0.96, 1.92) 0.09
  1. OR odds ratio, CI confidence interval, PC principal components
  2. * Scores represent the first three principal components that explained 77% of the variability in the data. Scores were named according to loadings of 0.40 or larger
  3. P values for interaction tests between each risk factor and urbanicity (vs. rural), OR and 95% CI were estimated through conditional logistic regression accounting for matching