Received: 9 December 2020
Accepted: 30 March 2021
First Online: 13 April 2021
: The Sri Lanka Demographic and Health Survey obtained written informed consent from all the participants during the data collection. The survey secured ethical clearance from SriLanka Medical Association- Ethics review committee. All methods were performed in accordance with the relevant guidelines and regulations (Declaration of Helsinki). Permission was obtained to analyse this data from the Department of Census and Statistics in Sri Lanka.
: Not applicable.
: The authors declare that they have no competing interests.