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Table 5 Factors associated with maternal moderate anaemia. Salavan Province, Laos, 2014

From: Prevalence of malaria in pregnancy in southern Laos: a cross-sectional survey

  Univariate analysisa P value Multivariate analysisa P value
Crude IRR (95 % CI) Adjusted IRR (95 % CI)
Age (years) (20–24 = Ref)   0.69   
 <20 1.18 (0.78–1.79)    
 25–27 1.07 (0.70–1.65)    
 ≥28 0.90 (0.61–1.33)    
Primigravidity 0.76 (0.54–1.04) 0.10   
Tobacco use 1.31 (0.87–1.96) 0.19   
Ethnicity Lao Theung (Ref = Lao Loum) 2.07 (1.56–2.74) <0.001 1.49 (0.99–2.25) 0.05
Place of living (Ref = Salavan)   <0.001   0.02
Vapi 0.41 (0.19–0.88)   0.45 (0.21–0.98)  
Toumlane 1.92 (1.44–2.58)   1.42 (0.94–2.16)  
Others 0.49 (0.17–1.39)   0.46 (0.16–1.33)  
Went to the forest during the current pregnancy 1.12 (0.83–1.51) 0.47   
No bed net use 1.80 (1.24–2.63) 0.002   
Number of ANC visits (≥4 = Ref)   0.007   
 1–3 1.33 (0.98–1.82)    
 0 2.09 (1.29–3.39)    
Gestational hypertension 0.79 (0.30–2.10) 0.64   
Iron supplementation (intake the day before admission = Ref)   0.03   0.06
 Intake, but not  before admission 1.02 (0.58–1.78)   1.00 (0.56–1.79)  
 No intake during  pregnancy 1.75 (1.16–2.62)   1.58 (1.08–2.32)  
Folic acid supplementation (intake the day before  admission = Ref)   0.34   
 Intake, but not before admission 1.25 (0.76–2.05)    
 No intake during  pregnancy 0.80 (0.53–1.22)    
Duration of pregnancy (weeks gestation) (37–38 = Ref)   0.55   
 ≥39 0.83 (0.56–1.24)    
 <37 1.11 (0.68–1.83)    
  1. IRR incidence rate ratio
  2. aThe analysis was conducted using a modified Poisson regression. The multivariate analysis was performed on 326 women. The final model was obtained after a backward selection procedure