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Table 4 Uni- and multivariable mixed effects logistic regression model for P. falciparum RDT positivity at visit 1

From: Reduction of malaria prevalence after introduction of artemisinin-combination-therapy in Mbeya Region, Tanzania: results from a cohort study with 6773 participants

Covariate N N-pos. %-pos. Univariable Multivariable
OR 95% CI p value OR 95% CI p value
Gender
 Femalea 3663 84 2.29 1.00 – to – 1.00 – to –
 Male 3106 82 2.64 1.14 (0.99 to 1.31) 0.0747 1.10 (0.95 to 1.26) 0.1929
Age at Srv1 (years)
 0– < 5a 1026 16 1.56 1.00 – to – 1.00 – to –
 5– < 10 1158 34 2.94 2.07 (1.35 to 3.17) 0.0009 2.05 (1.32 to 3.17) 0.0013
 10– < 20 1592 69 4.33 3.10 (2.20 to 4.37) < 0.0001 3.04 (2.14 to 4.32) < 0.0001
 20– < 40 1720 26 1.51 1.03 (0.49 to 2.18) 0.9356 1.06 (0.50 to 2.22) 0.8802
 ≥ 40 1273 21 1.65 1.09 (0.48 to 2.43) 0.8426 0.99 (0.42 to 2.32) 0.9808
Bed net owned
 Noa 5089 89 1.75 1.00 – to – 1.00 – to –
 Yes 1680 77 4.58 0.44 (0.22 to 0.92) 0.0281 0.56 (0.18 to 1.73) 0.3139
SES-score
 Per unit 0.72 (0.64 to 0.81) < 0.0001 0.81 (0.65 to 1.00) 0.0515
NDVI
 Per 0.1 NDVI units 2.20 (1.01 to 4.82) 0.0479 1.83 (0.81 to 4.17) 0.1490
  1. Using robust variance estimates and including site and household as random effects to adjust for clustering, N = 6769
  2. N number of observations, N-pos. number of positives, %-pos. percent positive, OR odds ratio, 95% CI 95% confidence interval
  3. a Reference stratum