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Table 2 Factors associated with malaria infection in the univariate and multivariate analysis

From: Risk factors for malaria infection prevalence and household vector density between mass distribution campaigns of long-lasting insecticidal nets in North-western Tanzania

  Number of children % with malaria infection (%) Univariate Multivariate
OR 96% CI p-value OR 96% CI p-value
Altitude (metres)
 Low (1128–1264) 1300 74.7 1      
 Medium (1265–1352) 1291 68.1 0.38 0.28–0.50 0.001 0.78 0.42–1.43 0.416
 High (1353–1654) 1266 51.0 0.14 0.10–0.20 0.001 0.27 0.14–0.55  < 0.001
Age
 < 1 year 384 50.5 1      
 2–4 years 1062 63.0 1.86 1.44–2.41  < 0.001 2.59 1.31–5.11 0.006
 5–14 years 2414 67.7 2.52 1.99–3.20  < 0.001 3.82 1.89–7.72  < 0.001
Improved housing structure
 No 589 76.9 1    1   
 Yes 3272 62.5 0.32 0.22–0.48 < 0.001 0.27 0.13–0.54  < 0.001
Socio economic status
 Poorest 1261 72.6 1    1   
 Middle 1264 64.3 0.72 0.59–0.86 0.001 0.98 0.51–1.89 0.961
 Least poor 1258 57.6 0.50 0.42–0.60  < 0.001 1.07 0.52–2.19 0.862
Adequate access to LLINs
 No 3167 66.0 1    1   
 Yes 643 58.8 0.68 0.57–0.83  < 0.001 0.57 0.34–0.98 0.042
Individual net age
 < 2 years 350 52.9 1    1   
 2–3 years 295 64.1 2.32 1.26–4.28 0.007 1.89 1.01–3.53 0.044
 4 years and more 299 65.9 2.37 1.28–4.37 0.006 1.90 1.02–3.58 0.004
Sex
 Male 1869 66.0 1      
 Female 1870 63.4 0.87 0.75–1.01 0.061    
Eaves of the house
 Open 2334 69.2 1      
 Closed 1478 57.9 0.59 0.51–0.69  < 0.001    
Livestock present
 No 1026 67.6 1      
 Yes 2786 63.7 0.77 0.65–0.91 0.002    
Animals kept inside the house
 No 1857 63.5 1      
 Yes 935 63.6 0.97 0.81–1.17 0.757    
Head of household attended school
 No 1007 71.4 1      
 Yes (any schooling) 2791 62.4 0.74 0.62–0.88 0.001    
IRS 18 months before
 No 2798 67.0 1      
 Yes 979 59.1 0.84 0.70–1.01 0.06    
Household owns at least 1 net
 No 1165 69.1 1      
 Yes 2647 62.6 0.71 0.60–0.83  < 0.001    
Individual usage of LLIN
 Don’t use net 2276 66.4 1      
 Use net 1045 61.2 0.69 0.50–0.94 0.018    
Individual LLIN condition
 Use good condition net (PHI > 64) 154 68.2 1      
 Use moderate condition net (PHI 65–642) 206 61.7 0.65 0.28–1.49 0.307    
 Use torn net (PHI > 643) 221 63.8 0.77 0.34–1.77 0.544