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Table 3 Risk factors for low birth weight

From: Malaria in pregnant women in an area with sustained high coverage of insecticide-treated bed nets

Variable At risk of LBW (n) Univariate analysis odds ratio (95% (CI) LR (p-value) Multivariate analysis odds ratio (95% (CI) LRT
Age 404 0.89 (0.81 – 0.97) < 0.01 0.92 (0.83 – 1.02)  
Patient's home:    0.66   
   Ifakara & vicinity 299 1    
   Beyond Ifakara 105 1.15 (0.62 – 2.12)    
Parity:    0.04   
   Secundigravid 156 1    
   Primigravid 248 1.89 (1.02 – 3.48)   1.40 (0.69 – 2.82)  
Age*Parity (interaction) 404    0.82 (0.67 – 1.01) 0.07
Use of bednet:    0.05   
   Never used 37 1    
   Untreated 273 0.36 (0.17 – 0.77)   0.34 (0.16 – 0.74)  
   Treated bednet 94 0.19 (0.07 – 0.53)   0.22 (0.08 – 0.59)  
Report of self-medication:    0.65   
   Never used 228 1    
   Antimalarial 103 0.98 (0.52 – 1.86)    
   Other forms 73 0.66 (0.29 – 1.48)    
Reported fever episode:    0.78   
   Never reported 229 1    
   Reported 175 1.08 (0.62 – 1.88)    
Placenta parasitaemia:    0.31   
   Absent 371 1    
   Present 33 1.62 (0.67 – 3.91)    
Neonates sex    0.24   
   Male 213 1    
   Female 203 1.15 (0.66 – 1.98)    
  1. ¶-N = 60 cases of LBW (Birth weight < 2500 g)
  2. LR-likelihood ratio
  3. LRT-Likelihood ratio test for interaction