title: Efficacy of pemetrexed plus platinum doublet chemotherapy as first-line treatment for advanced nonsquamous non-small-cell-lung cancer: a systematic review and meta-analysis.
abstract: OBJECTIVE
  To assess the efficacy of pemetrexed plus platinum doublet chemotherapy as first-line treatment for advanced nonsquamous non-small-cell lung cancer (NSCLC) through a trial-level meta-analysis.
  
  
  METHODS
  Trials published between 1990 and 2015 were identified by an electronic search of public databases (Medline, Embase, and Cochrane Library). All clinical studies were independently identified by two authors. Demographic data, treatment regimens, objective response rate (ORR), progression-free survival (PFS), and overall survival (OS) were extracted and analyzed using comprehensive meta-analysis software (version 2.0).
  
  
  RESULTS
  A total of 2,551 patients with advanced nonsquamous NSCLC from ten trials were included for analysis: 1,565 patients were treated with pemetrexed plus platinum doublet chemotherapy and 986 with platinum plus other first-line chemotherapy. Pooled ORR for pemetrexed plus platinum chemotherapy was 37.8% (95% confidence interval [CI]: 31.7%-44.3%), with median PFS and OS of 5.7 and 16.05 months, respectively. When compared to other platinum-based doublet chemotherapies, the use of pemetrexed plus platinum chemotherapy significantly improved OS (hazard ratio [HR] =0.86, 95% CI: 0.77-0.97, P=0.01) but not PFS (HR =0.90, 95% CI: 0.80-1.01, P=0.084) in advanced nonsquamous NSCLC patients.
  
  
  CONCLUSIONS
  Pemetrexed plus platinum doublet regimen is an efficacious treatment for advanced nonsquamous NSCLC patients. Our findings support the use of pemetrexed plus platinum doublet regimen as first-line treatment in advanced nonsquamous NSCLC patients because of its potential survival benefits.
authors.affiliation: Department of Cardiothoracic Surgery, Zhejiang Corps Hospital, Chinese People's Armed Police Force, Jiaxing, Zhejiang Province, People's Republic of China.
authors.forename: Huai-Qing
authors.initials: HQ
authors.lastname: Xiao
authors.affiliation: Department of Respiratory, Affiliated Haian People's Hospital of Nantong University, Haian, Jiangsu, People's Republic of China.
authors.forename: Rong-Hua
authors.initials: RH
authors.lastname: Tian
authors.affiliation: Department of Cardiothoracic Surgery, Zhejiang Corps Hospital, Chinese People's Armed Police Force, Jiaxing, Zhejiang Province, People's Republic of China.
authors.forename: Zhi-Hao
authors.initials: ZH
authors.lastname: Zhang
authors.affiliation: Department of Cardiothoracic Surgery, Zhejiang Corps Hospital, Chinese People's Armed Police Force, Jiaxing, Zhejiang Province, People's Republic of China.
authors.forename: Kai-Qi
authors.initials: KQ
authors.lastname: Du
authors.affiliation: Department of Cardiothoracic Surgery, The First Affiliated Hospital of Zhejiang University, Hangzhou, Zhejiang Province, People's Republic of China.
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Ni
keywords: chemotherapy-naive; lung cancer; pemetrexed; pooled analysis; randomized controlled trials