title: Surgical lung cancer. Risk operative analysis.
abstract: OBJECTIVE
  To identify those variables that are associated with operative morbidity or mortality in cases of thoracotomy in lung cancer.
  
  
  METHODS
  Third level university hospital.
  
  
  METHODS
  Consecutive patients with thoracotomy due to lung cancer operated on between 1994 and 1997 (n = 115).
  
  
  METHODS
  Pre- and postoperative variables potentially associated with operative morbidity or mortality were retrieved prospectively as follows: demographic and clinical characteristics of the patients, cardiopulmonary function characteristics, tumour characteristics, and treatment characteristics. A bivariate analysis of all variables under evaluation was carried out in order to identify those variables associated with operative morbidity and mortality. A multivariable analysis of the selected variables was then conducted using a logistic model.
  
  
  RESULTS
  The predicted postoperative product (predicted FEV1 x predicting diffusing capacity of carbon monoxide), the carbon monoxide diffusion coefficient (Kco) and the contralateral pulmonary perfusion are variables that relate to the overall morbidity or mortality (number of events 63, 55%) (-2 log likelihood chi2 = 22.9; R2 = 0.27). For variables associated with postoperative morbidity, the best associative model combines functional variables (diffusion, predicted FEV1), endoscopic variables (obstructed segments to be resected), clinical variables (comorbidity) and an important postoperative variable, the pathological tumoural staging (pN) (number of events 49, 43%) (-2 log likelihood chi2 = 32.9; R2 = 0.36).
  
  
  CONCLUSIONS
  The numerous variables under analysis are poorly associated with morbidity or mortality after thoracotomy in lung cancer. With regard to postoperative morbidity, the best associative models combine information that is known pre- and postoperatively and which is provided by both the patient and the tumour.
authors.affiliation: Pneumology Service, Hospital Universitario 12 de Octubre, Avenida Andalucía 5.4, Madrid 28041, Spain. lencuent@h12o.es
authors.forename: Angel
authors.initials: A
authors.lastname: López-Encuentra
authors.forename: Francisco
authors.initials: F
authors.lastname: Pozo-Rodríguez
authors.forename: Pedro
authors.initials: P
authors.lastname: Martín-Escribano
authors.forename: José Luis
authors.initials: JL
authors.lastname: Martín de Nicolás
authors.forename: María Josefa
authors.initials: MJ
authors.lastname: Díaz de Atauri
authors.forename: Jesús
authors.initials: J
authors.lastname: Palomera
authors.forename: Carmen
authors.initials: C
authors.lastname: Marrón
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011013:Pneumonectomy / Q000401:mortality*; D018570:Risk Assessment; D012307:Risk Factors; D013908:Thoracotomy / Q000401:mortality*