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Table 6 Assessment of risk factors for asymptomatic malaria infections between villages and IDP camps

From: Risk factors for asymptomatic malaria infections from seasonal cross-sectional surveys along the China–Myanmar border

Predictive factors

Category

Villages

IDP camps

Risk ratio (95% CI)2

PCR+ (%)

AOR (95% CI)1

PCR+ (%)

AOR (95% CI)1

Villages/IDP camps

Overall

 

26.0

 

22.5

 

1.21 (0.94−1.55)

Individual-level

 Gender

Male

31.9

1.36 (0.77–2.40)

30.0

1.55 (1.06–2.26)*

1.10 (0.73−1.63)

Female

22.4

1

19.7

1

1.18 (0.85−1.63)

 Age groups (years)

≤ 15

32.5

1.47 (0.80−2.70)

33.4

1.48 (1.03−2.14)*

0.96 (0.57−1.62)

> 15

24.5

1

18.5

1

1.43 (1.07−1.91)*

 Bed net use

No

32.4

2.65 (1.61−4.35)***

37.0

7.37 (5.15−10.53)***

0.82 (0.61−1.10)

Yes

15.1

1

7.0

1

2.34 (1.38−3.97)**

Household-level

 Major material of house

Wood/bamboo

29.56

22.46

1.46 (1.10−1.92)**

Brick

16.92

1

1

 Use of IRS

No

34.4

8.70 (3.82−19.79)***

27.2

2.67 (1.90−3.77)***

1.40 (1.06−1.85)*

Yes

5.4

1

12.4

1

0.40 (0.18−0.91)*

 Elevation of house (m)

≤ 312

33.4

3.42 (1.51−7.72)**

25.6

0.70 (0.48−1.01)

1.46 (1.08−1.97)*

> 312

8.3

1

19.8

1

0.37 (0.19−0.70)**

 Distance to the nearest clinic (m)

≤ 180

13.2

1

16.4

1

0.77 (0.49−1.24)

> 180

35.4

2.63 (1.47−4.71)**

19.9

2.51 (1.69−3.74)***

1.29 (0.94−1.76)

 Distance to the nearest road (m)

≤ 15

28.4

25.4

1.16 (0.86−1.58)

> 15

21.8

1

17.5

1

1.32 (0.85−2.05)

  1. PCR+ PCR positive, AOR adjusted odds ratio, CI confidence interval, IRS indoor residual spray
  2. 1Multivariate logistic regression model was used for mixed effected risk factors analysis
  3. 2Infection rate of asymptomatic malaria for predictive factors were compared between local villages and IDP camps by using the Chi square (χ2) test
  4. P <0.05; ** P <0.01; *** P <0.001