Setting
Data were gathered from the National Birth Registry of Austria between
2008 and 2017 after approval (EK Nr: 1576/2018) by the ethics committee
of the Medical University of Vienna, Austria (Chairperson Dr. Juergen
Zezula) on 8 August 2018, and reported according to the STROBE
statement.15 The registry is operated and maintained
by the Institute of Clinical Epidemiology of the Tirol Kliniken,
collecting birth records of all 75 hospitals in Austria providing
inpatient obstetric care, and thereby representing 99% of annual
deliveries.