title: The Cataract National Dataset electronic multi-centre audit of 55,567 operations: variation in posterior capsule rupture rates between surgeons.
abstract: OBJECTIVE
  To demonstrate variations in posterior capsule rupture (PCR) rate between surgeons of the same and different grades as a by-product of routine clinical care.
  
  
  METHODS
  NHS departments using electronic medical record (EMR) systems to collect the Cataract National Dataset (CND) were invited to submit data. Data were remotely extracted, anonymised, assessed for conformity and completeness, and analysed for rates of PCR for individual surgeons within each of the three grades.
  
  
  RESULTS
  Data were extracted on 55,567 cataract operations performed at 12 NHS trusts by 406 surgeons between November 2001 and July 2006. Data on the grade of 404 of the 406 surgeons who contributed to the study were available for 55,515 cases (99.9%) and were used for this analysis. Variation in PCR rate between surgeons was highest for the most junior grade of surgeon and between those surgeons contributing relatively few cases to the data set. Variation in PCR was lowest among experienced surgeons contributing large numbers of cases to the data set.
  
  
  CONCLUSIONS
  Considerable variation in PCR rate exists both between and within surgical grades. Routine electronic collection of the CND allows detailed analysis of variations in PCR rates between individual surgeons. To define acceptable limits for this benchmark complication of cataract surgery, further work is needed to adjust surgeons' outcomes for the case mix complexity.
authors.affiliation: Gloucestershire Eye Department, Cheltenham General Hospital, Cheltenham, UK. rob.johnston@glos.nhs.uk
authors.forename: R L
authors.initials: RL
authors.lastname: Johnston
authors.forename: H
authors.initials: H
authors.lastname: Taylor
authors.forename: R
authors.initials: R
authors.lastname: Smith
authors.forename: J M
authors.initials: JM
authors.lastname: Sparrow
mesh_terms: D002387:Cataract Extraction / Q000009:adverse effects*; D054869:Clinical Audit; D002983:Clinical Competence / Q000592:standards* / Q000706:statistics & numerical data; D003430:Cross-Sectional Studies; D006801:Humans; D015994:Incidence; D019654:Lens Implantation, Intraocular / Q000009:adverse effects*; D057852:Posterior Capsule of the Lens / Q000293:injuries*; D011446:Prospective Studies; D012421:Rupture / Q000209:etiology*; D013222:State Medicine; D006113:United Kingdom / Q000453:epidemiology