Population and sampling
The study involved children with retinoblastoma aged 0 to 17 who were consecutively admitted with retinoblastoma in the selected centers during the period from January 1, 2013, to December 31, 2015. Children whose records did not contain essential information (sex, age, laterality, acceptance of treatment, date of the last news or death or end of treatment) were excluded from the analysis.
The children were included in the study after obtaining written or oral informed consent from their parents (caregivers), in accordance with the local recommendations and the guidelines of the GFAOP15. This study received approval from the ethics committees of the University of Lubumbashi and the Felix Houphouët Boigny University of the Ivory Coast.