Search the entire Understanding Patient Data site Search Equal access to bowel cancer treatments in Yorkshire Using patient data to identify and improve areas of poor practice Monitoring joint replacement surgery Analysing registry data to improve performance and safety Comparing the uptake of emergency operations for heart attack across England Using registry data to examine rates of emergency coronary intervention across England 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