Table 3

The association between place of birth (home birth vs hospital birth) and breast feeding in GUI (n=10 604) and UKMCS (n=17 521) cohorts

Breast feeding time pointStudy populationUnadjusted analysisAdjusted analysis
OR95% CIp ValueOR95% CIp Value
InitiationGUI2.231.53 to 3.24<0.00011.91.19 to 3.02<0.0001
InitiationUKMCS2.311.74 to 3.05<0.00012.491.84 to 3.440.011
8 weeksGUI2.251.61 to 3.13<0.00011.781.18 to 2.690.0029
8 weeksUKMCS2.692.14 to 3.38<0.00012.491.92 to 3.26<0.0001
6 monthsGUI2.231.61 to 3.09<0.00011.851.23 to 2.770.0058
6 monthsUKMCS3.32.66 to 4.10<0.00012.92.25 to 3.73<0.0001
6 months: exclusiveGUI2.942.01 to 4.31<0.00012.771.78 to 4.330.0073
6 months: exclusiveUKMCS3.171.79 to 5.60<0.00012.241.14 to 4.03<0.0001
  • The ORs and corresponding 95% CIs are shown for any breast feeding at birth, 8 weeks and 6 months, and exclusive breast feeding for 6 months, according to place of birth (home vs hospital birth).

  • The strongest association in GUI is with exclusive breast feeding for 6 months, adjusted OR=2.77 (1.78 to 4.33), and in UKMCS it is with breast feeding for 6 months, 2.90 (2.25 to 3.73); the weakest association in GUI is with breast feeding for 8 weeks, 1.78 (1.18 to 2.69), and in UKMCS it is with breast feeding exclusively for 6 months, 2.24 (1.14 to 4.03).

  • Other covariates which were associated with breast feeding initiation and at all assessed time points included maternal factors; older maternal age and perception of low support (GUI); birth factors; later gestational age and heavier birth weight; and socioeconomic factors; higher education level, higher household income and later timing of return to work. Negatively associated covariates included maternal factors; Irish or British ethnicity, higher parity, smoking status: smoker, higher alcohol consumption and higher BMI; socioeconomic factors; long-term unemployment; birth characteristics: caesarean mode of delivery and infant characteristics: male infant.

  • BMI, body mass index; GUI, Growing Up in Ireland; UKMCS, UK Millennium Cohort Study.