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Table 4 Assessment of risk factors for asymptomatic malaria infection

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

Predictive factors Category PCR positive [n (%)] Univariate P value1 Multivariate P value2
OR (95% CI) AOR (95% CI)
Individual level
 Gender Male 153 (30.7) 1.73 (1.37, 2.20) < 0.001 1.51 (1.16, 1.97) 0.002
Female 240 (20.3) 1   1  
 Age groups (years) ≤ 15 135 (33.3) 1.96 (1.53, 2.51) < 0.001 1.49 (1.13, 1.96) 0.004
> 15 258 (20.3) 1   1  
 Bed net use No 326 (35.6) 5.73 (4.31, 7.62) < 0.001 5.49 (4.12, 7.32) < 0.001
Yes 67 (87.8) 1   1  
Household level
 Major material of house Wood/bamboo 371 (37.0) 1.55 (0.96, 2.48) 0.072 1.90 (1.15, 3.14) 0.012
Brick 22 (30.1) 1   1  
 Use of IRS No 337 (48.5) 3.44 (2.54, 4.66) < 0.001 3.40 (2.50, 4.65) < 0.001
Yes 56 (14.7) 1   1  
 Elevation of house (m) ≤ 312 250 (45.0) 1.82 (1.45, 2.30) < 0.001 1.11 (0.83, 1.49) 0.490
> 312 143 (27.5) 1   1  
 Distance to the nearest clinic (m) > 180 257 (54.9) 2.49 (1.97, 3.15) < 0.001 2.05 (1.53, 2.75) < 0.001
≤ 180 136 (22.4) 1   1  
 Distance to the nearest road (m) ≤ 15 277 (48.2) 1.55 (1.22, 1.98) < 0.001 1.20 (0.92, 1.57) 0.189
> 15 116 (23.2) 1   1  
  1. PCR polymerase chain reaction, OR odds ratio, AOR adjusted odds ratio, CI confidence interval, IRS indoor residual spraying
  2. 1P value was determined in a univariate logistic regression model
  3. 2P value was assessed in the multivariate mixed effects logistic regression model—variables with P values < 0.25 in the unadjusted analysis were considered