Background There is an urgency to redress unacceptable maternal and infant health outcomes for First Nations families in Australia. A multi-agency partnership between two Aboriginal Community-controlled health services and a tertiary hospital in urban Australia designed, implemented, and evaluated the new Birthing in Our Community (BiOC) service. In this study, we aimed to assess and report the clinical effectiveness of the BiOC service on key maternal and infant health outcomes compared with that of standard care. Methods Pregnant women attending the Mater Mothers Public Hospital (Brisbane, QLD, Australia) who were having a First Nations baby were invited to receive the BiOC service. In this prospective, non-randomised, interventional trial of the service, we specifically enrolled women who intended to birth at the study hospital, and had a referral from a family doctor or Aboriginal Medical Service. Participants were offered either standard care services or the BiOC service. Prespecified primary outcomes to test the effectiveness of the BiOC service versus standard care were the proportion of women attending five or more antenatal visits, smoking after 20 weeks of gestation, who had a preterm birth (<37 weeks), and who were exclusively breastfeeding at discharge from hospital. We used inverse probability of treatment weighting to balance confounders and calculate treatment effect. This trial is registered with the Australian New Zealand Clinical Trial Registry, ACTRN12618001365257.

Background: Prevention of avoidable preterm birth in Aboriginal and Torres Strait Islander (Indigenous) families is a major public health priority in Australia. Evidence about effective, scalable strategies to improve maternal and infant outcomes is urgently needed. In 2013, a multiagency partnership between two Aboriginal Community Controlled Health Organisations and a tertiary maternity hospital co-designed a new service aimed at reducing preterm birth: 'Birthing in Our Community'. Methods: A prospective interventional cohort study compared outcomes for women with an Indigenous baby receiving care through a new service (n = 461) to women receiving standard care (n = 563), January 2013-December 2017. The primary outcome was preterm birth (b 37 weeks gestation). One to one propensity score matching was used to select equal sized standard care and new service cohorts with similar distribution of characteristics. Conditional logistic regression calculated the odds ratio with matched samples. Findings: Women receiving the new service were less likely to give birth to a preterm infant than women receiving standard care (6•9% compared to 11.6%). After controlling for confounders, the new service significantly reduced the odds of having a preterm birth (unmatched, n = 1024: OR = 0•57, 95% CI 0•37, 0•89; matched, n = 690: OR = 0•50, 95% CI 0•31, 0•83). Interpretation: The short-term results of this service redesign send a strong signal that the preterm birth gap can be reduced through targeted interventions that increase Indigenous governance of, and workforce in, maternity services and provide continuity of midwifery carer, an integrated approach to supportive family services and a community-based hub.