title: [Examination using multivariate analysis of the risk factors by surgical approach in elderly intractable pneumothorax].
abstract: OBJECTIVE
  In this study, we evaluated the risk factors for postoperative complications in elderly patients with intractable pneumothorax and constructed a risk assessment model.
  
  
  METHODS
  Between January 2004 and December 2011, 83 elderly patients( age, 75 years or older) underwent an operation at our hospital for intractable pneumothorax. Preoperative factors of these cases were assessed to clarify which is contributory to the development of postoperative complications by using univariate analysis and multivariate logistic regression analysis.
  
  
  RESULTS
  Thirty-five patients (42.2%) developed postoperative complications. In univariate analysis, total protein, albumin level, blood urea nitrogen, creatinine level, Paco2, body mass index, performance status, and preoperative respiratory complications showed statistically significant associations with the occurrence of postoperative complications. In the multivariate analysis, the performance status showed a statistically significant association( 95% confidence interval, 1.17〜4.44;odds ratio, 2.28;p=0.0157).
  
  
  CONCLUSIONS
  The results suggested that the preoperative examinations were useful in predicting postoperative complications in the elderly patients with intractable pneumothorax. Poor performance status, low nutrition, respiratory failure, and preoperative respiratory complications are risk factors for postoperative complications in elderly patients with intractable pneumothorax.
authors.affiliation: Department of Thoracic Surgery, Tohoku Kosei Nenkin Hospital, Sendai, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yabuki
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Tabata
authors.forename: Takafumi
authors.initials: T
authors.lastname: Sugawara
authors.forename: Hideki
authors.initials: H
authors.lastname: Mitomo
authors.forename: Akira
authors.initials: A
authors.lastname: Miyamoto
authors.forename: Shigefumi
authors.initials: S
authors.lastname: Fujimura
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D015999:Multivariate Analysis; D009752:Nutritional Status; D011030:Pneumothorax / Q000601:surgery*; D011183:Postoperative Complications; D012131:Respiratory Insufficiency / Q000150:complications; D012140:Respiratory Tract Diseases / Q000150:complications; D012189:Retrospective Studies; D012307:Risk Factors