Received: 24 September 2018
Accepted: 24 May 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: Access to the dataset was granted by the DHS program-ICF International, Rockville, the USA after the submission of a written request through their online platform and a waiver was granted by the Sierra Leone Ethics and Scientific Review Committee since this is a secondary data analysis study. Written informed consent was obtained from all participants at the time the two surveys were conducted.
: Not applicable.
: The authors declare that they have no competing interests.