Sierra Leone is being the top country by maternal mortality ratio in the world. As of 2015, maternal mortality ratio in Sierra Leone was 1,360 per 100,000 live births. The top 5 countries also includes Central African Republic, Chad, Nigeria, and South Sudan.
Maternal mortality ratio is the number of women who die during pregnancy and childbirth, per 100,000 live births. The data are estimated with a regression model using information on fertility, birth attendants, and HIV prevalence.