title: Meta-analysis on inoperable pancreatic cancer: a comparison between gemcitabine-based combination therapy and gemcitabine alone.
abstract: OBJECTIVE
  To compare gemcitabine-based combination therapy and gemcitabine (GEM) alone in patients with advanced pancreatic cancer (APCa) through meta-analysis.
  
  
  METHODS
  MEDLINE and EMBASE searches were supplemented by information from trial registers of randomized controlled trials (RCTs) for GEM-based combination therapy and GEM alone for APCa. A quantitative meta-analysis was carried out by two reviewers based on the inclusion criteria from all available RCTs. The meta-analysis involved overall survival (OS), objective remission rate (ORR), clinical benefit rate (CBR), time to progress/progress free survival (TTP/PFS) and toxicity.
  
  
  RESULTS
  The meta-analysis included 22 RCTs. There was significant improvement in the GEM combination group with regard to the 6-mo survival rate (RD = 0.04, 95% CI 0.01-0.06, P = 0.008), 1-year survival rate (RD = 0.03, 95% CI 0.01-0.05, P = 0.01), ORR (RD = 0.04, 95% CI 0.01-0.07, P = 0.02), CBR (RD = 0.10, 95% CI 0.02-0.17, P = 0.01) and 6-mo TTP/PFS (RD = 0.07, 95% CI 0.04-0.10, P < 0.00001). However, the Grade 3-4 toxicity set by WHO was higher for the GEM combination group for neutropenia (RD = 0.05, 95% CI 0.01-0.10, P = 0.02), thrombocytopenia (RD = 0.05, 95% CI 0.02-0.08, P = 0.002) and vomiting/nausea (RD = 0.03, 95% CI 0.00-0.05, P = 0.02).
  
  
  CONCLUSIONS
  GEM-based combination therapy may improve the overall survival and palliation in optimal patients with APCa as compared with GEM alone.
authors.affiliation: Department of Oncology, Second Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong Province, China. xiederong@21cn.con
authors.forename: De-Rong
authors.initials: DR
authors.lastname: Xie
authors.forename: Han-Lin
authors.initials: HL
authors.lastname: Liang
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Shuan-Shuan
authors.initials: SS
authors.lastname: Guo
authors.forename: Qiong
authors.initials: Q
authors.lastname: Yang
mesh_terms: D000964:Antimetabolites, Antineoplastic / Q000009:adverse effects / Q000627:therapeutic use*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D003841:Deoxycytidine / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D018450:Disease Progression; D004305:Dose-Response Relationship, Drug; D006801:Humans; D010190:Pancreatic Neoplasms / Q000188:drug therapy*; D011446:Prospective Studies; D016032:Randomized Controlled Trials as Topic; D015996:Survival Rate; D016896:Treatment Outcome; D000093542:Gemcitabine
chemical_list: D000964:Antimetabolites, Antineoplastic; D003841:Deoxycytidine; D000093542:Gemcitabine