title: Identifying co-morbidity in surgical patients using administrative data with the Royal College of Surgeons Charlson Score.
authors.affiliation: Clinical Effectiveness Unit, The Royal College of Surgeons of England, London, UK.
authors.forename: J N
authors.initials: JN
authors.lastname: Armitage
authors.forename: J H
authors.initials: JH
authors.lastname: van der Meulen
mesh_terms: D002138:Calibration; D015897:Comorbidity; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012720:Severity of Illness Index; D013514:Surgical Procedures, Operative / Q000401:mortality*; D016896:Treatment Outcome