title: The association between clinical prognostic factors and epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI) efficacy in advanced non-small-cell lung cancer patients: a retrospective assessment of 94 cases with EGFR mutations.
abstract: OBJECTIVE
  This study aimed to examine the association of clinical prognostic factors with epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI) efficacy in advanced non-small-cell lung cancer (NSCLC) patients.
  
  
  METHODS
  The demographic and clinical characteristics of 94 patients with stage IV NSCLC were retrospectively reviewed, and the association between clinical factors and EGFR-TKIs efficacy was evaluated.
  
  
  RESULTS
  Of the 94 stage IV NSCLC patients enrolled in this study, a 74.5% objective response rate (ORR) and 97.9% disease control rate (DCR) were observed for EGFR-TKIs treatment, and a higher ORR was seen in patients with 0 and 1 ECOG scores than those with 2 or greater scores (P = 0.049). The subjects had a median PFS of 11 months and a median OS of 31 months after EGFR-TKIs treatment. ECOG score and timing of targeted therapy were factors affecting PFS, and ECOG score, smoking status and brain metastasis were factors affecting OS. In addition, ECOG score was an independent prognostic factor for PFS in stage IV NSCLC patients, and the patients with EGFR 19del mutation had a longer PFS than those with exon 21 L855R mutation (P = 0.003), while ECOG score and brain metastasis were independent prognostic factors for OS.
  
  
  CONCLUSIONS
  The results of this study demonstrate that EGFR-TKI therapy results in survival benefits for EGFR-mutant advanced NSCLC patients, regardless of gender, smoking history, pathologic type, type of EGFR mutations, brain metastasis and timing of targeted therapy. ECOG score is an independent prognostic factor for PFS, and ECOG score and brain metastasis are independent prognostic factors for OS in advanced NSCLC patients.
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Jing-Hui
authors.initials: JH
authors.lastname: Lin
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Lin
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Xu
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Hui-Hua
authors.initials: HH
authors.lastname: Hu
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Hai-Peng
authors.initials: HP
authors.lastname: Xu
authors.affiliation: Department of Thoracic Medical Oncology, Fujian Provincial Cancer Hospital & Cancer Hospital Affiliated to Fujian Medical University, Fuzhou 350014, Fujian Province, China.|Group of Lung Cancer Treatment, Fujian Provincial Key Laboratory of Translational Cancer Medicine, Fuzhou 350014, Fujian Province, China.
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: He
mesh_terms: D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000494:pharmacology / Q000627:therapeutic use*; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy* / Q000235:genetics / Q000401:mortality* / Q000473:pathology; D066246:ErbB Receptors / Q000037:antagonists & inhibitors* / Q000235:genetics; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000235:genetics / Q000401:mortality* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D058990:Molecular Targeted Therapy; D009154:Mutation; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D047428:Protein Kinase Inhibitors / Q000494:pharmacology / Q000627:therapeutic use*; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D000970:Antineoplastic Agents; D047428:Protein Kinase Inhibitors; D066246:ErbB Receptors
keywords: epidermal growth factor receptor; epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI); non-small-cell lung cancer; prognostic factor; retrospective analysis