Changing risk factors for placental abruption : a case crossover study using routinely collected data from Finland, Malta and Aberdeen

ACKNOWLEDGEMENTS With thanks to the women from Malta, Finland and Aberdeen whose data is included and to all who contributed to the datasets used. Data Availability: The dataset was created from three population based international datasets and permissions obtained from governing committees for the 3 databases. Therefore permission for public access to data will need to be given by all three committees. The Finnish register data have been given for this specific study, and the data cannot be shared without authorization from the register keepers. More information on the authorization application to researchers who meet the criteria for access to confidential data can be found at https://thl.fi/fi/web/thlfi-en/statistics/information-for-researchers/authorisation-application (THL). Similarly data from Aberdeen can be accessed by applying to the AMND steering committee found at https://www.abdn.ac.uk/iahs/research/obsgynae/amnd/access.php. The authors did not have special access privileges in accessing the data. Funding: Funding was received from NHS Grampian Endowment Fund (Grant number RG14524-10) to cover data access and storage costs and for article processing charges for open access publication for this research project. The funders played no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewedPublisher PD