Development and prospective external validation of a tool to predict poor recovery at 9 months after acute ankle sprain in UK emergency departments: the SPRAINED prognostic model

Objectives To develop and externally validate a prognostic model for poor recovery after ankle sprain. Setting and participants Model development used secondary data analysis of 584 participants from a UK multicentre randomised clinical trial. External validation used data from 682 participants recruited in 10 UK emergency departments for a prospective observational cohort. Outcome and analysis Poor recovery was defined as presence of pain,...