title: [Predictive factors for response and survival of gefitinib-treated locally advanced or metastatic non-small cell lung cancer patients: a retrospective analysis of two phase II clinical trials].
abstract: OBJECTIVE
  Clinical factors and molecular markers can be used to predict the prognosis of gefitinib-treated locally advanced or metastatic non-small cell lung cancer (NSCLC). This study was to identify predictive factors for the response and survival of gefitinib-treated locally advanced or metastatic NSCLC patients in China.
  
  
  METHODS
  Clinical data of 256 gefitinib-treated Chinese NSCLC patients from two existing clinical trials were analyzed. Univariate and multivariate analyses were performed to determine predictive factors of response and survival.
  
  
  RESULTS
  The objective response rate was 24.6%; the disease control rate was 54.7%. Median survival time was 11.43 months (95% CI, 8.64-14.22 months). The 1-year survival rate was 48.0% (95% CI, 41.0%-55.0%). Adenocarcinoma and skin rash were associated with better response. The patients with lower performance status (PS) score (0-1) and those with disease control (complete remission, partial remission, and stable disease) had longer survival when compared with their counterparts.
  
  
  CONCLUSIONS
  Adenocarcinoma and skin rash are predictors of better response to gefitinib. Low PS score and disease control are predictors of longer survival after treatment of gefitinib.
authors.affiliation: State Key Laboratory of Oncology in South China, Guangzhou, Guangdong, 510060, P. R. China.
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Zhao
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hong-Yun
authors.initials: HY
authors.lastname: Zhao
authors.forename: Jing-Xun
authors.initials: JX
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Jiang
authors.forename: Cong
authors.initials: C
authors.lastname: Xue
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000970:Antineoplastic Agents / Q000009:adverse effects / Q000627:therapeutic use*; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy* / Q000473:pathology; D017322:Clinical Trials, Phase II as Topic; D018450:Disease Progression; D005076:Exanthema / Q000139:chemically induced; D005260:Female; D005500:Follow-Up Studies; D000077156:Gefitinib; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D011799:Quinazolines / Q000009:adverse effects / Q000627:therapeutic use*; D012074:Remission Induction; D012189:Retrospective Studies; D015996:Survival Rate; D055815:Young Adult
chemical_list: D000970:Antineoplastic Agents; D011799:Quinazolines; D000077156:Gefitinib