Launay CP, et al. - Authours evaluated the age effect on the performance criteria of the 10-item brief geriatric assessment (BGA) for the prolonged length of hospital stay (LHS) using artificial neural networks (ANNs) analysis. During the ED visit and prior to discharge to acute care wards, the 10-items of BGA were recorded. For the prediction of prolonged LHS using MLP, age effect on the performance criteria of the 10-item BGA was minimal with a good balance between criteria. This tool could be used as a screening as well as a predictive tool for prolonged LHS.