title: [Meta-analysis of diagnostic capability of frequency-doubling technology (FDT) for primary glaucoma].
abstract: OBJECTIVE
  To evaluate the overall diagnostic capabilities of frequency-doubling technology (FDT) in patients of primary glaucoma, with standard automated perimetry (SAP) and/or optic disc appearance as the gold standard.
  
  
  METHODS
  A comprehensive electric search in MEDLINE, EMBASE, Cochrane Library, BIOSIS, Previews, HMIC, IPA, OVID, CNKI, CBMdisc, VIP information, CMCC, CCPD, SSreader and 21dmedia and a manual search in related textbooks, journals, congress articles and their references were performed to identify relevant English and Chinese language articles. Criteria for adaptability were established according to validity criteria for diagnostic research published by the Cochrane Methods Group on Screening and Diagnostic Tests. Quality of the included articles was assessed and relevant materials were extracted for studying. Statistical analysis was performed with Meta Test version 0.6 software. Heterogeneity of the included articles was tested, which was used to select appropriate effect model to calculate pooled weighted sensitivity and specificity. Summary Receiver Operating Characteristic (SROC) curve was established and the area under the curve (AUC) was calculated. Finally, sensitivity analysis was performed.
  
  
  RESULTS
  Fifteen English articles (21 studies) of 206 retrieved articles were included in the present study, with a total of 3172 patients. The reported sensitivity of FDT ranged from 0.51 to 1.00, and specificity from 0.58 to 1.00. The pooled weighted sensitivity and specificity for FDT with 95% confidence intervals (95% CI) after correction for standard error were 0.86 (0.80 - 0.90), 0.87 (0.81 - 0.91), respectively. The AUC of SROC was 93.01%. Sensitivity analysis demonstrated no disproportionate influences of individual study.
  
  
  CONCLUSIONS
  The included articles are of good quality and FDT can be a highly efficient diagnostic test for primary glaucoma based on Meta-analysis. However, a high quality perspective study is still required for further analysis.
authors.affiliation: Department of Ophthalmology, Daping Hospital, Third Military Medical University, Chongqing 400042, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Liu
authors.forename: Xiang-ge
authors.initials: XG
authors.lastname: He
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015706:Bibliometrics; D005260:Female; D005654:Fundus Oculi; D005901:Glaucoma / Q000175:diagnosis*; D006801:Humans; D008297:Male; D015201:Meta-Analysis as Topic; D008875:Middle Aged; D019721:Ophthalmoscopes / Q000592:standards; D012680:Sensitivity and Specificity; D058609:Visual Field Tests / Q000379:methods* / Q000592:standards