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Table 3 Association of maternal, delivery and infant characteristics with possible serious bacterial infection

From: Risk factors for possible serious bacterial infection in a rural cohort of young infants in central India

  Percent with PSBI Unadjusted Risk Ratio (95 % Confidence Interval) Adjusted Risk Ratioa (95 % Confidence Interval)
Year
 2010 7 % 1.00   1.00  
 2011 6 % 0.84 (0.60, 1.17) 0.81 (0.57, 1.15)
 2012 5 % 0.69 (0.48, 1.00) 0.66 (0.46, 0.93)
 2013 5 % 0.66 (0.42, 1.04) 0.66 (0.36, 1.20)
Maternal age
 <20 8 % 1.46 (1.21, 1.70) 1.11 (0.93, 1.32)
 ≥ 20 6 % 1.00   1.00  
Maternal education
 Primary or less 5 % 0.95 (0.87, 1.05) 0.89 (0.80, 1.00)
 Secondary or more 5 % 1.00   1.00  
Parity
 0 6 % 1.23 (1.11, 1.36) 1.13 (1.03, 1.23)
 1–2 5 % 1.00   1.00  
 >2 7 % 1.38 (1.15, 1.66) 1.30 (1.07, 1.57)
Maternal anemia
 No anemia (Hgb ≥11) 6 % 1.00   1.00  
 Mild anemia (Hgb 10- < 11) 6 % 0.96 (0.71, 1.30) 0.96 (0.79, 1.16)
 Moderate to severe anemia (Hgb <10) 6 % 0.99 (0.58, 1.70) 0.92 (0.64, 1.31)
Trimester of first antenatal care visit
 First 5 % 1.00   1.00  
 Second or Third 7 % 1.56 (1.12, 2.17) 1.46 (1.08, 1.98)
 Received antenatal care, no information on timing 12 % 2.68 (1.65, 4.36) 2.27 (1.29, 4.00)
 No antenatal care 13 % 2.88 (1.40, 5.93) 3.21 (1.66, 6.20)
Location of delivery
 Referral government 6 % 1.00   1.00  
 Referral private 5 % 0.89 (0.67, 1.17) 0.83 (0.65, 1.06)
 First level facility 6 % 1.07 (0.88, 1.30) 1.14 (1.00, 1.30)
 Home/Other 8 % 1.38 (1.04, 1.84) 1.16 (0.86, 1.57)
Mode of delivery
 Vaginal 6 % 1.00   1.00  
 C-section 6 % 1.04 (0.88, 1.25) 0.48 (0.36, 0.63)
Prolonged or obstructed labor or failure to progress
 Yes 7 % 1.18 (0.84, 1.64) 1.22 (0.87, 1.69)
 No 6 % 1.00   1.00  
Antenatal corticosteroids
 Yes 13 % 2.43 (1.86, 3.16) 2.04 (1.60, 2.61)
 No 5 % 1.00   1.00  
Birth Weight
 Normal birth weight (≥ 2500 gm) 4 % 1.00   1.00  
 Low birth weight (1500- < 2500 gm) 16 % 3.86 (2.68, 5.55) 3.10 (2.17, 4.42)
Initiation of breastfeeding within 1 hour after delivery
 Yes 5 % 1.00   1.00  
 No 13 % 2.79 (1.95, 3.98) 3.87 (2.69, 5.58)
Sex
 Male 6 % 1.17 (1.07, 1.29) 1.20 (1.10, 1.31)
 Female 5 % 1.00   1.00  
  1. a36,410 of 37,379 (97 %) observations were included in the multivariable model