Epidemiologic characteristics, clinical manifestations, and risk factors of 139 patients with Ebola virus disease in western Sierra Leone

•The 2014 West Africa Ebola virus outbreak is the largest Ebola virus disease (EVD) epidemic on record, and Sierra Leone is one of the severe outbreak sites.•This study fully described epidemiological characteristics, clinical manifestations and clinical outcomes of 139 laboratory-confirmed EVD patients who admitted to the JUI Holding and Treatment Centre in western Sierra Leone between 15 November, 2014 and 18 January, 2015.•The median age of investigated patients was 29 years and 55.4% were female. Of them, 76 patients (54.7%) died, and 63 patients (45.3%) were cured.•Our data showed that mortality of EVD was associated with an older age, fever and probably hiccups.