This uses the data within PPM+, the EHR for the Leeds Cancer Centre and Leeds Teaching Hospitals. It includes all patients diagnosed with cancer since 1990, all chemotherapy since 1993, all radiotherapy since 1994. It integrates all sources of electronic data including in-patient admissions, out-patient events, all radiology reports, all pathology reports, all blood tests, all microbiology, all letters/annotations generated digitally. It collects detailed diagnosis information on patients referred with a suspicion of/diagnosis of cancer and generates the outputs which support national cancer registration, cancer outcomes services dataset, SACT (chemo), RTDS (radiotherapy), cancer waiting times. It contains data on >300,000 cancer patients which reflect Leeds activity as a local hospital for the population of 850,000, the regional cancer centre for 2.7M and the specialist referral centre for rare cancers (paediatric, soft-tissue sarcoma) for the 5.4M from Yorkshire & Humber. This dataset has been used to examine diagnosis to death care of cohorts of cancer patients with lung, breast, colorectal, ovary, bladder cancer including all recurrence events and hence can describe time to progression, progression-free and overall survival from first diagnosis, 1st recurrence, 2nd recurrence.