Received: 22 January 2019
Accepted: 3 July 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: Data for this analysis come from public available dataset of DHS Program, the conduct of the survey was approved by Ethics Committee of the ICF Macro at Calverton in the USA and by the National Institute of Medical Research Ethics Committee in Tanzania.
: The written approval to access the dataset and publish findings was obtained from the data archivist of the DHS Program.
: The authors declare that they have no competing interests.