https://www.selleckchem.com/pr....oducts/ll37-human.ht
We examine the suitability of three methods using patient-level data to evaluate the time-varying impacts of national healthcare guidelines. Such guidelines often codify progressive change and are implemented gradually; for example, National Institute for Health and Care Excellence (NICE) suspected-cancer referral guidelines. These were revised on June 23, 2015, to include more cancer symptoms and test results ("features", partly reflecting changing practice. We explore the time-varying impact of guideline revision on time to colore