title: An examination of factors influencing the choice of therapy for patients with coronary artery disease.
abstract: BACKGROUND
  A diverse range of factors influence clinicians' decisions regarding the allocation of patients to different treatments for coronary artery disease in routine cardiology clinics. These include demographic measures, risk factors, co-morbidities, measures of objective cardiac disease, symptom reports and functional limitations. This study examined which of these factors differentiated patients receiving angioplasty from medication; bypass surgery from medication; and bypass surgery from angioplasty.
  
  
  METHODS
  Univariate and multivariate logistic regression analyses were conducted on patient data from 214 coronary artery disease patients who at the time of recruitment had been received a clinical assessment and were reviewed by their cardiologist in order to determine the form of treatment they were to undergo: 70 would receive/continue medication, 71 were to undergo angioplasty and 73 were to undergo bypass surgery.
  
  
  RESULTS
  Analyses differentiating patients receiving angioplasty from medication produced 9 significant univariate predictors, of which 5 were also multivariately significant (left anterior descending artery disease, previous coronary interventions, age, hypertension and frequency of angina). The analyses differentiating patients receiving surgery from angioplasty produced 12 significant univariate predictors, of which 4 were multivariately significant (limitations in mobility range, circumflex artery disease, previous coronary interventions and educational level). The analyses differentiating patients receiving surgery from medication produced 14 significant univariate predictors, of which 4 were multivariately significant (left anterior descending artery disease, previous cerebral events, limitations in mobility range and circumflex artery disease).
  
  
  CONCLUSIONS
  Variables emphasised in clinical guidelines are clearly involved in coronary artery disease treatment decisions. However, variables beyond these may also be important factors when therapy decisions are undertaken thus their roles require further investigation.
authors.affiliation: Health Psychology Unit, Centre for Behavioural and Social Sciences in Medicine University College London, Wolfson Building, 48 Riding House Street, London W1W 7EY, UK. s.hirani@ucl.ac.uk
authors.forename: Shashivadan P
authors.initials: SP
authors.lastname: Hirani
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Hyam
authors.forename: Shahzad
authors.initials: S
authors.lastname: Shaefi
authors.forename: John M
authors.initials: JM
authors.lastname: Walker
authors.forename: Robin K
authors.initials: RK
authors.lastname: Walesby
authors.forename: Stanton P
authors.initials: SP
authors.lastname: Newman
mesh_terms: D015906:Angioplasty, Balloon, Coronary; D001026:Coronary Artery Bypass; D003324:Coronary Artery Disease / Q000188:drug therapy / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged