Résumé : The study's aim was to evaluate the impact of an in-service training course and supervision of physicians and nurses in terms of quality of care on intra-hospital mortality. The study included 2 cohorts of children. Cohort 1 included 414 children from 0 to 15 yearsold who were followed in the paediatric wards of the provincial hospital of Goma (HPG) between April 1, 2003 and March 31, 2004. Cohort 2 included 996 children from 0 to 15 yearsold where were treated and followed in the same service between January 1, 2005 and December 31, 2005. General and specific mortalities occurring before and after an intervention were compared, as were the ratios of the observed deaths to the predicted deaths through the application of the Goma1 model to cohort 2. Overall mortality decreased by 15,9% (before the intervention) to 4,6% (after the intervention), translating to a total reduction of 71,1%. The ratios between the observed deaths and the predicted deaths were lower than 1, globally and when stratified. The risk of death in the cohort 1 (before the intervention) is 6,8 times higher than in cohort 2 (after the intervention). This shows an improvement of child survival after the intervention. © S.F.S.P.. Tous droits réservés pour tous pays.