Data collection was performed using a paper form that also collected
information about adequacy of health care and any delays in receiving
appropriate care. These data were then transferred by local researchers
to electronic forms hosted on the Brazilian Network for Surveillance of
Severe Maternal Morbidity Study Group website, located within the
institutional web page of the coordinating center (University of
Campinas, Campinas, Brazil). Completed electronic forms were sent
to a central database using OpenClinica version 3.0 (https://www.
openclinica.com/), a specialized platform designed to manage clini-
cal studies. Further methodological details are available elsewhere
[15,19,20].