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Table 4 Uni-variate and multi-variate analysis of factors associated with sub-microscopic Plasmodium falciparum infection*

From: Association of sub-microscopic malaria parasite carriage with transmission intensity in north-eastern Tanzania

  Univariate analysis Multivariate analysis
  OR(95%CI) p -value OR(95%CI) p -value
Age group, years
0-4 1.00 - 1.00 -
5-14 0.99(0.70-1.41) 0.947 0.83 (0.50-1.58) 0.438
15-45 1.18(0.79-1.77) 0.375 1.00 (0.70-.41) 0.981
Transect/distance from ocean
Rombo 1.00 - 1.00 -
South Pare 1.21 (0.23-6.36) 0.802 1.01 (0.47-2.16) 0.985
West Usambara 4.46 (0.88-22.49) 0.067 4.80 (1.79-12.86) 0.005
Tanga coast 23.86(7.00-81.29) < 0.0001 8.61 (2.36-31.40) 0.003
Altitude band
< 600 m 1.00 - 1.00 -
600-1200 m 0.28 (0.08-1.01) 0.052 0.40 (0.14-1.14) 0.081
> 1200 m 0.10 (0.02-0.43) 0.005 0.12 (0.03-0.50) 0.007
Bed net use 0.70 (0.25-1.96) 0.468 0.71 (0.40-1.26) 0.218
Sex 1.09 (0.76-1.56) 0.629 1.13 (0.60-2.12) 0.679
Fever 1.07 (0.55-2.07) 0.827 0.85 (0.53-1.35) 0.450
Treatment 0.70 (0.43-1.15) 0.143 0.77 (0.44-1.35) 0.325
  1. *The above analysis is after excluding individuals who were microscopy parasite positive.
  2. OR Odds ratio, CI Confidence interval
  3. Regression analysis was conducted in Stata using the 'svy' function to allow for stratified analysis with village as the primary sampling unit