We will use data from an ongoing prospective cohort study called Towards Improved Trauma Care Outcomes (TITCO) in India that started in four public university hospitals across urban India. The four centres are Lokmanya Tilak Municipal General Hospital in Mumbai, King Edward Memorial Hospital in Mumbai, Jai Prakash Narayan Apex Trauma Center in Delhi, and the Institute of Post-Graduate Medical Education and Research and Seth Sukhlal Karnani Memorial Hospital in Kolkata. The data used in this study was collected between October 2013 and January 2015.