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Table 3 Crude and adjusted incidence rate ratios (IRR) of low birth weight, maternal anaemia and perinatal mortality by trimester of malaria infection using Poisson regression

From: An analysis of timing and frequency of malaria infection during pregnancy in relation to the risk of low birth weight, anaemia and perinatal mortality in Burkina Faso

  Crude IRR (95%CI) Adjusted IRR(95%CI)
Maternal anaemia   
   No infection (391/816) 1.00 1.00
   Infection in 1st trimester (15/31) 1.00 (0.69-1.46) 0.98 (0.67-1.42)
   Infection in 2nd trimester (34/69) 1.03 (0.80-1.32) 0.99 (0.76-1.27)
   Infection in 3rd trimester (58/118) 1.02 (0.84-1.24) 0.97 (0.79-1.20)
Low birth weight   
   No infection(96/816) 1.00 1.00
   Infection in 1st trimester (13/31) 3.56 (2.26-5.61) a 2.07 (1.30-3.27) b
   Infection in 2nd trimester (14/69) 1.72 (1.04-2.85) c 1.09 (0.65-1.82)
   Infection in 3rd trimester (16/118) 1.15 (0.70-1.88) 0.78 (0.46-1.32)
Perinatal mortality   
   No infection(15/816) 1.00 1.00
   Infection in 1st trimester (0/31) - -
   Infection in 2nd trimester (3/69) 2.36 (0.70-7.97) 1.18 (0.31-4.47)
   Infection in 3rd trimester (1/118) 0.46 (0.06-3.46) 0.37 (0.04-2.81)
  1. Adjusted IRR accounted for women age, parity, BMI, SP doses received and delivery season. ap < 0.001, b p = 0.002, c p = 0.034