TABLE 5

Association Between Breastfeeding and Fever Stratified by Potential Confounders

ConfounderBreastfeedingRelative Risk for Fever95% CI
Maternal smoking
    YesExclusive0.230.07 to 0.80
Partial0.570.33 to 0.97
    NoExclusive0.560.38 to 0.81
Partial0.640.45 to 0.89
Other children at home
    YesExclusive0.660.44 to 0.97
Partial0.560.37 to 0.83
    NoExclusive0.300.16 to 0.56
Partial0.620.42 to 0.91
Maternal education ≤8 y
    YesExclusive0.510.30 to 0.88
Partial0.400.23 to 0.70
    NoExclusive0.490.31 to 0.77
Partial0.730.51 to 1.00
First vaccine dose
    YesExclusive0.480.30 to 0.80
Partial0.420.22 to 0.79
    NoExclusive0.600.40 to 1.00
Partial0.660.49 to 0.88
  • Mantel-Haenszel adjusted risk ratio for exclusive breastfeeding = 0.50 (95% CI: 0.42 to 0.60); Breslow-Day test for interaction over strata: P = .48. Mantel-Haenszel adjusted risk ratio for partial breastfeeding = 0.59 (95% CI: 0.52 to 0.68); Breslow-Day test for interaction over strata: P = .66.