Prognostic models for identifying risk of poor outcome in people with acute ankle sprains: the SPRAINED development and external validation study

Background Ankle sprains are very common injuries. Although recovery can occur within weeks, around one-third of patients have longer-term problems. Objectives To develop and externally validate a prognostic model for identifying people at increased risk of poor outcome after an acute ankle sprain. Design Development of a prognostic model in a clinical trial cohort data set and external validation in a prospective cohort study. Setting Emergency...