title: [Study of prognostic factors in patients with stage I non-small cell lung cancer].
abstract: OBJECTIVE
  To analyze the prognostic factors for patients with stage I non-small cell lung cancer.
  
  
  METHODS
  A total of 224 patients with stage I non-small cell lung cancer operated from 1999 to 2004 were retrospectively reviewed. The clinical profiles of age, gender, T grade, type of resection, tumor pathological typing, tumor cell differentiation and post-operative chemotherapy were analyzed by SPSS 13.0 statistic software.
  
  
  RESULTS
  The five-year survival of stages Ia and Ib non-small cell lung cancer were 78.7% and 51.5% respectively. In univariate analysis, T grade and tumor cell differentiation were independent prognostic factors respectively. In multivariate analysis, T grade and tumor cell differentiation were independent prognostic factors for overall survival.
  
  
  CONCLUSIONS
  There are significant differences in the five-year survival of stages Ia and Ib non-small lung cancer. Both tumor stage and tumor cell differentiation were independent prognostic factor for overall survival.
authors.affiliation: Department of Thoracic Surgery, Beijing Chest Hospital, Beijing 101149, China.
authors.forename: Jun-zhong
authors.initials: JZ
authors.lastname: Ruan
authors.forename: Yong
authors.initials: Y
authors.lastname: Duan
authors.forename: Ming
authors.initials: M
authors.lastname: Qin
authors.forename: Zi-tong
authors.initials: ZT
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000175:diagnosis / Q000473:pathology*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011184:Postoperative Period; D011379:Prognosis; D012189:Retrospective Studies