Received: 22 July 2019
Accepted: 13 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: Ethical approval (REF No BE288/18) was obtained from the University of KwaZulu-Natal Biomedical Research Ethics Committee (UKZNBREC). Authorisation to use the data was obtained from Measure DHS via the DHS Program Website.
: Not applicable.
: The authors declare that they have no competing interests.