Received: 12 February 2019
Accepted: 31 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: This study is a secondary data analysis of the ENSAT 2017. The data for the analysis were obtained from the survey public repository hosted at the IMSS webpage at: ExternalRef removed. This repository has the data already de-identified; thus, it is not possible to trace any of the data to the actual individual. In accordance to the Internal Regulation of the Research Ethics Committee of the National Institute of Public Health in Mexico, this secondary analysis was considered exempt of approval.
: Not applicable. The article does not contain any individual person’s data.
: One of the authors 'Svetlana Vladislavovna Doubova' is an Associate Editor of BMC Health Services Research.