Disparities In Access to the Northwest Ambulance Service During Pregnancy, Birth and Postpartum Period and Its Association With Neonatal and Maternal Outcomes

Background:

This study will be the first United Kingdom (UK)-based study to investigate access to ambulance services for women and families from diverse backgrounds during pregnancy, birth and early postpartum period. The study will explore relevant maternal and infant outcomes for families who seek help from the ambulance service to explore health disparities in accessing urgent and emergency care. Findings from this study will inform local and national policy aimed at reducing maternal and perinatal mortality and morbidity. This will contribute to the identification of access challenges experienced by seldom-heard women in a crucially important, but under investigated area of unscheduled urgent and emergency maternity care.

Methods:

A mixed methods approach including two work packages (WP). WP1 includes a retrospective comparative cohort study (WP1) to describe the characteristics of and outcomes for pregnant women and their neonates who are transferred via ambulance to Manchester University National Health Service (NHS) Foundation Trust (MFT) and those that are not. Descriptive statistics with comparative analyses will be presented. WP2 includes a qualitative framework analysis of a purposive sub-sample of routinely collected free-text digital records documented by paramedics for women who arrived at the unit via ambulance. Purposive sampling will be undertaken for women who are identified at an increased risk of poor maternal and/or neonatal outcomes following WP1 analyses. The patient journey will be mapped, and patient profiles constructed. An explanatory mixed methods approach will be undertaken for triangulation of data for insight.

Discussion:

The study aims to provide an in-depth understanding of access to emergency maternity care to allow investigation of opportunities for alternative clinical decision making and review of current service provision. This also helps to identify women with increased risk factors for accessing urgent and emergency care as a gateway to maternity services. This will help to address timely access to the most appropriate services, reducing risk factors for adverse maternity and neonatal outcomes and associated impact upon the emergency services. Findings will be used to inform local and national interventions for at risk populations who access ambulance services during pregnancy, birth, and early postpartum. Findings will also support system conversations around the reasons for seeking help from the ambulance service in the perinatal period and ways to improve access and care provisions for underserved communities.

Work Package 1

Inclusion criteria

• North West Ambulance Service (NWAS) Cohort:

• Had at least one pregnancy start and/or gave birth between 1st August 2022 to 31st August 2024
• Accessed NWAS service in the perinatal period between 1st August 2022 to 31st August 2024, and were subsequently transferred to an Manchester University NHS Foundation Trust (MFT) maternity unit by ambulance (either to Saint Mary's Oxford Road, Saint Mary's Wythenshawe or Saint Mary's North Manchester sites)
• Can be linked to the HIVE electronic patient record (EPR) database
• Has an electronic delivery record on the MFT HIVE database
• Has not opted out of NHS national data opt-out usage.
• Comparison Manchester University NHS Foundation Trust (MFT) Cohort:

• Had at least one pregnancy start and/or gave birth between 1st August 2022 to 31st August 2024
• Not transferred by ambulance to an MFT maternity unit after contacting NWAS during the perinatal period
• Attended MFT maternity unit for birth (either Saint Marys Oxford Road, Saint Marys Wythenshawe or Saint Mary's North Manchester Sites) and therefore has an electronic birth record on the MFT HIVE EPR database
• Has not opted out of NHS national data opt-out usage.

Work Package 1

Exclusion criteria

• Opted out of NHS national data usage
• No pregnancy start or end date recorded/imputed
• No birth record on the MFT HIVE EPR database
• Was conveyed by ambulance to a non-MFT maternity unit/site.

Work Package 2

Inclusion criteria

• Female
• Had at least one pregnancy and/or gave birth between August 2022 to August 2024
• Accessed NWAS service in the perinatal period between August 2022 to August 2024, and subsequently transferred to an MFT maternity unit by ambulance (either St Marys Oxford Road, St Marys Wythenshawe or North Manchester Sites)
• Has not opted out of NHS national data opt-out usage.

Work Package 2

Exclusion criteria

• Opted out of NHS national data usage.