Table 2 Effect of type of milk and the introduction of solids on hospitalisation for diarrhoea and LRTI in the period following the introduction of solids until age 8 months
Milk and solid feeding during a given monthNo. of infant-monthsMonthly risk*of diarrhoea(no. of events)Adjusted OR for diarrhoea†(95% CI)Monthly risk*of LRTI(no. of events)Adjusted OR for LRTI†(95% CI)
Milk group (this month)
    Formula only77 8280.19 (155)10.48 (384)1
    Breast+formula11 3010.09 (9)0.73 (0.33 to 1.61)0.23 (28)0.67 (0.43 to 1.05)
    Breast milk only17 0190.04 (7)0.36 (0.15 to 0.88)0.28 (53)0.64 (0.44 to 0.93)
Age (months) when started solids
    ⩽117550.05 (3)0.23 (0.05 to 1.03)0.39 (8)0.77 (0.33 to 1.79)
    259570.33 (16)1.78 (0.89 to 3.58)0.69 (41)1.24 (0.73 to 2.10)
    326 0220.15 (42)0.89 (0.55 to 1.46)0.50 (137)1.20 (0.91 to 1.58)
    463 8560.14 (95)10.37 (254)1
    547500.16 (10)1.07 (0.44 to 2.58)0.24 (13)0.91 (0.47 to 1.75)
    ⩾637920.11 (5)0.61 (0.17 to 2.16)0.35 (12)1.04 (0.47 to 2.29)
  • *Monthly percentage risk; this is weighted and therefore does not equal 100×(no. of events/no. of infant-months); †for diarrhoea, odds ratios are adjusted for milk group, solids, baby’s age, mother’s age at delivery, mode of delivery and mother’s education; for LRTI, odds ratios are adjusted for milk group, solids, baby’s age, baby’s sex, mother’s age at delivery, mode of delivery, household income, whether the baby was first born, mother’s (current) smoking status and family history of asthma.

  • LRTI, lower respiratory tract infection; OR, odds ratio.