title: Incidence and Characteristics of Cataract Surgery in France from 2009 to 2012: A National Population Study.
abstract: OBJECTIVE
  To report age- and sex-specific incidence rates of cataract surgery in France and evaluate the trends of cataract surgery from 2009 to 2012.
  
  
  METHODS
  Cohort study.
  
  
  METHODS
  Data for all patients who underwent primary cataract surgery in France between January 2009 and December 2012 were collected from the national database.
  
  
  METHODS
  Annual incidence rates were calculated and adjusted to the corresponding-year national population data from the French National Institute of Statistics. Kaplan-Meier analysis was used to assess the time between surgeries for both eyes.
  
  
  METHODS
  Age- and sex-specific incidence of cataract surgery.
  
  
  RESULTS
  Over the 4 years, 2 717 203 eyes in 1 817 865 patients (59.1% were women; mean age, 73.5±0.015 years) underwent cataract surgery. Between 2009 and 2012, the total number of operated eyes per year increased, from 634 070 to 723 172 (+14.0%), and the number of patients with 1 or both eyes undergoing cataract surgery decreased, from 475 301 to 449 318 (-5.5%). The incidence of cataract surgery increased from 9.86 to 11.08/1000 person-years and that of operated patients (1 or both eyes) decreased from 7.39 to 6.89/1000 person-years. The incidence of cataract surgery ranged from 1.06/1000 person-years for patients aged 40 to 49 years to 65.94/1000 person-years for those aged 80 to 89 years. Between 2009 and 2012, the probability of second-eye surgery 12 months after the first-eye surgery increased from 40.6% to 51.2% (P < 0.0001). The median interval for surgery between eyes was 29 (interquartile range, 14-86) days. The rate of posterior capsular tear was 0.20%, with a higher proportion from extracapsular extraction than phacoemulsification (7.9% vs. 0.15%; P < 0.0001). The proportion of patients who underwent cataract surgery with a history of high myopia, eye trauma, or retinal detachment was 0.49%, 0.21%, and 0.80%, respectively.
  
  
  CONCLUSIONS
  This study documented the incidence and trends in cataract surgery in the overall population in France. Between 2009 and 2012, the number of people undergoing cataract surgery slightly decreased, but the total number of operated eyes increased because the proportion of surgeries on the second eye increased.
authors.affiliation: Inserm, U1061, Montpellier, France; University of Montpellier 1, Montpellier, France; Department of Ophthalmology, Gui De Chauliac Hospital, Montpellier, France. Electronic address: vincent.daien@gmail.com.
authors.forename: Vincent
authors.initials: V
authors.lastname: Daien
authors.affiliation: Regional Agency of Health, Biostatistics Department, Montpellier, France.
authors.forename: Annick
authors.initials: A
authors.lastname: Le Pape
authors.affiliation: Regional Agency of Health, Biostatistics Department, Montpellier, France.
authors.forename: Didier
authors.initials: D
authors.lastname: Heve
authors.affiliation: Inserm, U1061, Montpellier, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Carriere
authors.affiliation: University of Montpellier 1, Montpellier, France; Department of Ophthalmology, Gui De Chauliac Hospital, Montpellier, France.
authors.forename: Max
authors.initials: M
authors.lastname: Villain
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000453:epidemiology*; D002387:Cataract Extraction / Q000706:statistics & numerical data* / Q000639:trends; D015331:Cohort Studies; D005260:Female; D005602:France / Q000453:epidemiology; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D007431:Intraoperative Complications; D019654:Lens Implantation, Intraocular / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D017678:Sex Distribution