Table 2 Prevalence of wheeze, dyspnoea, prescription of inhaled steroids, asthma and chronic asthma at 8 years of age and adjusted association with breast feeding (total study population, n = 3115)
PrevalencePrevalence by breast feeding durationBF 1–16 weeks, adjusted†BF>16 weeks, adjusted†
None1–16 weeks>16 weeks
%No%No%No%NoOR (95% CI)OR (95% CI)
Wheeze6.31967.0376.91045.1550.93 (0.63 to 1.38)0.66 (0.42 to 1.04)
Dyspnoea8.52659.9529.11377.0760.87 (0.61 to 1.22)0.64 (0.43 to 0.94)*
Prescription inhaled steroids6.42008.5457.01054.6500.77 (0.53 to 1.12)0.50 (0.32 to 0.77)*
Asthma‡12.639215.48113.520310.01080.82 (0.61 to 1.09)0.57 (0.41 to 0.80)*
Chronic asthma§8.32579.5508.81336.9740.87 (0.62 to 1.24)0.65 (0.44 to 0.96)*
Asthma stratified by allergy mother/father:
Non-allergic mother (n = 2238)10.323114.05611.11217.3540.78 (0.55 to 1.11)0.52 (0.34 to 0.78)*
Allergic mother (n = 877)18.416119.52519.98216.1540.95 (0.57 to 1.59)0.70 (0.41 to 1.22)
Non-allergic father (n = 2171)10.422612.24711.41208.0590.91 (0.63 to 1.31)0.62 (0.40 to 0.94)*
Allergic father (n = 944)17.616623.93418.28314.2490.69 (0.43 to 1.10)0.51 (0.30 to 0.86)*
  • *p<0.05.

  • §Defined as asthma at 8 years of age in combination with asthma in at least two previous years.

  • ‡Defined as at least one attack of wheeze, one episode of dyspnoea or a prescription of inhaled steroids in the last year.

  • †No breast feeding is reference. Associations are adjusted for gender, maternal allergy, paternal allergy, maternal education, maternal smoking during pregnancy, and smoking by anyone in the house at 8 years.

  • BF, breast feeding.