title: Laparoscopic versus open gastrectomy for early gastric cancer in Asia: a meta-analysis.
abstract: OBJECTIVE
  To perform a meta-analysis comparing laparoscopic versus open gastrectomy (LG vs. OG) for early gastric cancer (EGC) in Asia.
  
  
  METHODS
  PubMed, Embase, CINAHL, AMED, the Cochrane database of Systematic Reviews, the Cochrane Controlled Trials Register, and the China National Knowledge Infrastructure electronic databases were systematically searched for studies published between January 1, 1992 and July 1, 2012. A series of clinical indices, including operative time, incision length, blood loss, harvested lymph nodes, time to flatus postoperatively, time to first oral intake postoperatively, use of analgesics, complications, duration of hospital stay, recurrence, and mortality were compared using weighted mean differences (WMDs) and odds ratios (ORs).
  
  
  RESULTS
  Five randomized controlled trials and 11 case controls were included, including 1665 patients with EGC (919 LG, 746 OG). LG was associated with less trauma (incision length: WMD -12.91 cm; P<0.00001), less blood loss (WMD -121.04 mL, P<0.00001), less postoperative pain (number of times to use analgesics: WMD -1.64; P=0.001), faster bowel recovery (time to flatus: WMD -0.62 d; P=0.0001), fewer serious complications (OR 0.57; P=0.01), and shorter postoperative hospital stay (WMD -3.73 d; P=0.0007). However, LG had longer operative times (WMD 44.09 min; P<0.00001). LG also had fewer harvested lymph nodes, although this difference was not statistically significant (WMD -3.43 lymph nodes; P=0.04). There was no difference in recurrence rates (OR 0.58; P=0.33) and mortality between LG and OG.
  
  
  CONCLUSIONS
  For the treatment of EGC in Asia, LG has several advantages, including safety, less trauma, and faster recovery. Our results should be validated in western studies.
authors.affiliation: Department of Gastrointestinal Surgery, the Fourth Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Chun-Dong
authors.initials: CD
authors.lastname: Zhang
authors.forename: Shu-Chen
authors.initials: SC
authors.lastname: Chen
authors.forename: Zi-Feng
authors.initials: ZF
authors.lastname: Feng
authors.forename: Zhe-Ming
authors.initials: ZM
authors.lastname: Zhao
authors.forename: Ji-Nan
authors.initials: JN
authors.lastname: Wang
authors.forename: Dong-Qiu
authors.initials: DQ
authors.lastname: Dai
mesh_terms: D000700:Analgesics / Q000627:therapeutic use; D001208:Asia; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data; D016022:Case-Control Studies; D005743:Gastrectomy / Q000379:methods*; D006801:Humans; D010535:Laparoscopy / Q000379:methods*; D007902:Length of Stay / Q000706:statistics & numerical data; D008197:Lymph Node Excision; D061646:Operative Time; D010149:Postoperative Pain / Q000209:etiology; D016032:Randomized Controlled Trials as Topic; D013274:Stomach Neoplasms / Q000601:surgery*
chemical_list: D000700:Analgesics