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Table 5 Uni- and multivariable mixed effects logistic regression models to assess the potential influence of changes in bed net ownership, SES and NDVI between visit 1 and visit 2 on change of P. falciparum RDT result from positive at visit 1 to negative at visit 2

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-chgd. %-chgd. Univariable Multivariable
OR 95% CI p value OR 95% CI p value
Gender
 Femalea 3663 80 2.18 1.00 – to – 1.00 – to –
 Male 3106 80 2.58 1.17 (0.97 to 1.41) 0.0950 1.12 (0.94 to 1.35) 0.2042
Age at visit 1, years
 0– < 5a 1026 16 1.56 1.00 – to – 1.00 – to –
 5– < 10 1158 32 2.76 1.95 (1.31 to 2.88) 0.0009 1.94 (1.29 to 2.91) 0.0013
 10– < 20 1592 67 4.21 3.00 (2.12 to 4.26) < 0 .0001 2.98 (2.10 to 4.23) < 0.0001
 20– < 40 1720 25 1.45 0.98 (0.49 to 1.99) 0.9658 0.99 (0.47 to 2.07) 0.9823
 ≥ 40 1273 20 1.57 1.02 (0.50 to 2.07) 0.9588 1.00 (0.49 to 2.03) 0.9947
Change in bed net ownership
 Lost net 211 8 3.79 0.74 (0.67 to 0.82) < 0.0001 0.76 (0.57 to 1.02) 0.0669
 No changea 6170 141 2.29 1.00 – to – 1.00 – to –
 Received net 388 11 2.84 0.99 (0.49 to 1.98) 0.9732 1.04 (0.48 to 2.24) 0.9209
Change in SES score
 (Per unit) 0.93 (0.74 to 1.17) 0.5614 0.96 (0.70 to 1.31) 0.7984
Relative change in NDVI
 Per 1% change 1.10 (1.00 to 1.21) 0.0565 1.10 (0.99 to 1.22) 0.0756
  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-chgd. and %-chgd. number and percentage of participants who changed from P. falciparum positive at visit 1 to negative at visit 2, OR odds ratio, 95% CI 95% confidence interval
  3. a Reference stratum