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Table 4 Multivariate adjusted analysis for the risk of exposure to Plasmodium vivax using survey logistic regression

From: Assessing malaria transmission in a low endemicity area of north-western Peru

Risk factors

Positive PvMSP1-19

Unadjusted

Adjusted ≈

 

%

95% CI

n

N

OR

95% CI

OR

95% CI

Settlement

        
 

PAV

12.7

[10.8; 14.9]

143

1,123

1.0

 

-

 

JCM

15.6

[13.1; 18.5]

123

789

1.3

[0.95; 1.7]

-

 

NP

12.7

[10.0; 15.9]

94

741

1.0

[0.7; 1.4]

-

 

House distance to water drain (m)

        
 

>250

9.5

[7.8; 11.6]

103

1,080

1.0

 

1.0

 

100–250

15.6

[13.6; 17.9]

217

1,391

1.8*

[1.3; 2.3]

1.8*

[1.4; 2.4]

<100

22.0

[16.2; 29.2]

40

182

2.7*

[1.7; 4.1]

2.8*

[1.8; 4.4]

Age groups (years)

        
 

0.5–5

6.7

[4.7; 9.4]

29

433

1.0

 

1.0°

 

6–10

8.9

[6.5; 12.1]

36

404

1.4

[0.8; 2.2]

  

11–19

13.9

[10.7; 16.7]

68

491

2.2*

[1.4; 3.5]

2.1*

[1.6; 2.8]

20–39

15.8

[13.4; 18.4]

140

889

2.6*

[1.7; 3.9]

  

> = 40

20.0

[16.5; 24.0]

87

436

3.5*

[2.2; 5.4]

3.1*

[2.2; 4.4]

Education

        
 

None

8.1

[6; 10.8]

39

483

1.0

 

-

 

Primary

13.3

[11.3; 15.7]

140

1,199

1.8*

[1.2; 2.5]

-

 

Secondary

16.3

[14; 19]

153

829

2.2*

[1.5; 3.2]

-

 

Superior

15.1

[10.7; 20.9]

27

141

2.0*

[1.2; 3.4]

-

 

Income amount

        
 

None

12.6

[11.1; 14.3]

261

2,067

1.0

 

-

 

< 650 PEN

17.9

[14.7; 21.7]

82

458

1.5*

[1.2; 2]

-

 

> = 650 PEN

14.5

[8.4; 23.8]

12

83

1.3

[0.6; 2.2]

-

 

Occupation as farmer

(previous 12 months)

        
 

No

13.3

[11.9; 14.8]

344

2,590

1.0

 

-

 

Yes

25.4

[16.3; 37.3]

16

63

2.2*

[1.3; 3.9]

-

 

Occupation as moto-taxi driver (previous 12 months)

        
 

Never/Sometimes

13.4

[12.1; 14.9]

347

2,584

1.0

 

-

 

Always

18.8

[11.2; 30.0]

13

69

1.5

[0.8; 2.8]

-

 

Bed net use

        
 

No

13.0

[11.1; 15.2]

162

1,244

1.0

 

-

 

Yes

14.1

[12.2; 16.2]

196

1,395

1.1

[0.9; 1.4]

-

 

Confirmed P. vivax malaria (previous 12 months)+

        
 

No

10.5

[9.3; 12]

247

2,346

1.0

 

-

 

Yes (1 episode)

33.3

[27.9; 39.3]

91

273

4.2*

[3.2; 5.7]

-

 

Yes (> = 2episodes)

64.7

[46.7; 79.3]

22

34

15.6*

[7.3; 33]

-

 
  1. * p < 0.05. + Not considered in the multivariate analysis.
  2. ° Baseline category = 0.5–10 years.
  3. Include ages between 11 and 39 years.
  4. A significant interaction (OR = 5.7; 95CI [1.4; 22.7], p = 0.014) was found between age >10 years and distance <100 m.