Funding for this research was provided by:
Nossal Global Health Scholars Programme
Received: 8 April 2019
Accepted: 6 August 2019
First Online: 20 August 2019
Ethics approval and consent to participate
: Data for this study were from the Philippines DHS rounds in 2003, 2008 and 2013, which were reviewed and approved by the ICF Institutional Review Board. Permission to use the data for this study was granted by the DHS Program.
: The authors declare that they have no competing interests.