Search the entire Understanding Patient Data site Search Reducing nationwide variation in stroke prevention and treatment Equal access to bowel cancer treatments in Yorkshire Demonstrating the safety of an anti-obesity medication Using data to ensure the safety of medications Improving treatment of teenage anxiety and depression Comparing the uptake of emergency operations for heart attack across England Using data to plan services for people living with and beyond cancer The impact of air pollution on health Using pan-European data to understand how air pollution affects health Investigating trends in diabetes across ethnic groups Understanding why diabetes rates vary between ethnic groups