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Open access
Research
Daphne N McRae,1 Patricia A Janssen,1 Saraswathi Vedam,2 Maureen Mayhew,1 Deborah Mpofu,3,4 Ulrich Teucher,5 Nazeem Muhajarine4
To cite: McRae DN, Janssen PA, Vedam S, et al. Reduced prevalence of small-forgestational-age and preterm birth for women of low socioeconomic position: a population-based cohort study comparing antenatal midwifery and physician models of care. BMJ Open 2018;8:e022220. doi:10.1136/ bmjopen-2018-022220 ►► Prepublication history and additional material for this paper are available online. To view these files, please visit the journal online (http://dx.doi. org/10.1136/bmjopen-2018- 022220).
Received 9 February 2018 Revised 5 June 2018 Accepted 29 August 2018
© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. For numbered affiliations see end of article. Correspondence to Dr Daphne N McRae; daphne.mcrae@u bc.ca
Abstract Objective Our aim was to investigate if antenatal midwifery care was associated with lower odds of smallfor-gestational-age (SGA) birth, preterm birth (PTB) or low birth weight (LBW) compared with general practitioner (GP) or obstetrician (OB) models of care for women of low socioeconomic position. Setting This population-level, retrospective cohort study used province-wide maternity, medical billing and demographic data from British Columbia, Canada. Participants Our study included 57 872 pregnant women, with low socioeconomic position, who: were residents of British Columbia, Canada, carried a singleton fetus, had low to moderate medical/obstetric risk, delivered between 2005 and 2012 and received medical insurance premium assistance. Primary and secondary outcome measures We report rates, adjusted ORs (aOR), and 95% CIs for the primary outcome, SGA birth (
