title: Meta-analysis of capsule endoscopy in patients diagnosed or suspected with esophageal varices.
abstract: OBJECTIVE
  To review the literature on capsule endoscopy (CE) for detecting esophageal varices using conventional esophagogastroduodenoscopy (EGD) as the standard.
  
  
  METHODS
  A strict literature search of studies comparing the yield of CE and EGD in patients diagnosed or suspected as having esophageal varices was conducted by both computer search and manual search. Data were extracted to estimate the pooled diagnostic sensitivity and specificity.
  
  
  RESULTS
  There were seven studies appropriate for meta-analysis in our study, involving 446 patients. The pooled sensitivity and specificity of CE for detecting esophageal varices were 85.8% and 80.5%, respectively. In subgroup analysis, the pooled sensitivity and specificity were 82.7% and 54.8% in screened patients, and 87.3% and 84.7% in the screened/patients under surveillance, respectively.
  
  
  CONCLUSIONS
  CE appears to have acceptable sensitivity and specificity in detecting esophageal varices. However, data are insufficient to determine the accurate diagnostic value of CE in the screen/surveillance of patients alone.
authors.affiliation: Department of Gastroenterology, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Lu
authors.forename: Rui
authors.initials: R
authors.lastname: Gao
authors.forename: Zhuan
authors.initials: Z
authors.lastname: Liao
authors.forename: Liang-Hao
authors.initials: LH
authors.lastname: Hu
authors.forename: Zhao-Shen
authors.initials: ZS
authors.lastname: Li
mesh_terms: D053704:Capsule Endoscopy; D004384:Duodenoscopy; D004932:Esophageal and Gastric Varices / Q000473:pathology*; D005773:Gastroscopy; D006801:Humans; D018579:Patient Selection; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity