I’ve been working a long time in understanding, measuring and communicating survival and other outcomes after children’s heart surgery. This includes developing the formula that the NHS uses to monitor survival rates.
I also led a project a couple of years ago to build this website that explains the formula to families and the public and gives the latest results: https://childrensheartsurgery.info/
I’m also currently working on this project, using maths to work out where children’s ambulance should be located in England. https://depict-study.org.uk/