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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