Category 42
Algorithmically-defined outcomes - Health-related outcomes


This category holds classification of selected health-related events, obtained through algorithmic combinations of coded information from UK Biobank's baseline assessment data collection (which included data from participants on their self-reported medical conditions, operations and medications), along with linked data from hospital admissions (diagnoses and procedures) and death registries. The classification is intended to help researchers to include health-related outcomes in their analyses without having to select lists of diagnostic and/or procedural codes and combine the different data sources themselves. It is based on algorithms developed by the UK Biobank outcome adjudication group, aiming to classify disease outcomes with high positive predictive value (i.e. a high probability that people classified as being positive for a health-related event have indeed experienced that event). Where possible, we provide the best available information on the estimated positive predictive value of each source or combination of sources so that researchers can use this information in their analyses.