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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