Table 1

Characteristics of the study population, the Espoo Cohort Study (n=2568)*

Sex of child
Duration of breast feeding, months
Duration of pregnancy, weeks
Maternal smoking during pregnancy
Family socioeconomic status
Parental atopy
Secondhand tobacco smoke exposure
Indoor mould exposure
  • *Missing value in the duration of breast feeding (n=79), duration of pregnancy (n=72), maternal smoking (n=5), family socioeconomic status (n=12) and indoor mould exposure (n=2).