README Data from: Invasive procedures at the end of life in patients with colorectal cancer: National population-based cohort study C Chamberlain, P Tammes,T Jones, AM Pullyblank, JM Blazeby, K E Henson PhD, S McPhail PhD, AGK McNair Variable names and descriptions OPCS (4 Character) United Kingdom Office of Population Censuses and Surveys Classification of Interventions and Procedures four character codes version 4 OPCS (3 character) United Kingdom Office of Population Censuses and Surveys Classification of Interventions and Procedures three character codes version 4 SHORTDESC Short description of Office of Population Censuses and Surveys Classification of Interventions and Procedures codes DESCRIPTION Full description of Office of Population Censuses and Surveys Classification of Interventions and Procedures codes ICD code International Classification of Disease version 10 code ICD description Description of International Classification of Disease version 10 code Cancer stage Union for International Cancer Control Tumor, node, metastasis derived stage Intent category Procedure intent category