The AIMS65 score was developed by Saltzman and colleagues in 2011 using data from 29,222 hospitalised patients with acute upper GI bleeding at 187 US hospitals (Premier hospital database). It was designed as an even simpler alternative to the Glasgow-Blatchford Score for predicting in-hospital mortality, length of stay, and cost — all using five variables available at initial presentation. The name AIMS65 is a mnemonic for its components: Albumin, INR, altered Mental Status, Systolic BP, and age ≥65. Its particular strength is predicting in-hospital mortality rather than need for intervention.