A key objective of the Lifeways cross generation cohort study is to examine health and healthcare, according to socio-economic indicators, during the first five years of life. GP contact details were available for 1032 children. 772 GPs in 589 practices were approached and data were obtained on 640 children (59% of original cohort). The mean follow-up time was 3.0 years (95% CI 2.5-3.5). 20.5% of children had a medical card. The mean GP consultation rate was 5.5 visits per child per year, 6.6 visits for children with a medical card and 5.1 for those without (95% CI 1.1 to 1.9) p = 0.001. 68 had a diagnosis of asthma; 19.10% with a medical card and 8.9% without (95% CI 3.0-17.5) p = 0.0001. 138 children had ever been admitted to hospital; 26.2% with a medical card and 21.0% without (95% CI -3.3% to 13.6%) p = 0.2. Incremental increases in parental income significantly decreased both the risk of asthma (p = 0.02) or hospital admission (p = 0.008).