title: Changes in the diabetic retinopathy epidemiology after 14 years in a population of Type 1 and 2 diabetic patients after the new diabetes mellitus diagnosis criteria and a more strict control of the patients.
abstract: OBJECTIVE
  To determine the differences observed between two transversal studies separated 14 years.
  
  
  METHODS
  The sample was obtained by randomized hazard selection of 1157 Type 2 and 93 Type 1 diabetic patients in the 2006 study, and 741 Type 2 and 76 Type 1 diabetic patients in the 1993 study. We evaluate the prevalence of diabetic retinopathy (DR), microalbuminuria, overt nephropathy, and its risk factors.
  
  
  RESULTS
  In Type 2 diabetic patients, we observed a decrease of the prevalence of DR from 39.41% in the 1993 study to 27.48% in the 2006 study, but we did not observe it in Type 1 diabetic patients-35.52% in 1993 to 36.55% in 2006. The diabetic macular edema prevalence is similar in both studies-7.15% in 1993 and 7.86% in 2006 in Type 2 patients, and 11.84-12.90% in Type 1; microalbuminuria decreased in Type 2 but not in Type 1 patients (from 22.13% to 17.02% in Type 2, and 28.33-27.95% in Type 1); overt nephropathy decreased in both types of diabetic patients (in Type 1, decreased from 11.84% to 8.60% and, in Type 2, from 8.63% to 6.74%). We may observe a decrease in the number of patients with blindness, from 11.20% to 4.90% in Type 2, and from 9.21% to 7.52% in Type 1 patients.
  
  
  CONCLUSIONS
  We may observe a decrease in the prevalence of DR, overt nephropathy, and blindness in Type 1 and 2 patients and a decrease in the prevalence of microalbuminuria only in Type 2 patients.
authors.affiliation: Department of Ophthalmology Reus, Spain, Universidad Rovira i Virgili, Reus, Spain. promero@grupsagessa.com
authors.forename: Pedro
authors.initials: P
authors.lastname: Romero-Aroca
authors.forename: Juan
authors.initials: J
authors.lastname: Fernández-Balart
authors.forename: Marc
authors.initials: M
authors.lastname: Baget-Bernaldiz
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Martinez-Salcedo
authors.forename: Isabel
authors.initials: I
authors.lastname: Méndez-Marín
authors.forename: Mercè
authors.initials: M
authors.lastname: Salvat-Serra
authors.forename: Jose Antonio
authors.initials: JA
authors.lastname: Buil-Calvo
mesh_terms: D000293:Adolescent; D000328:Adult; D000419:Albuminuria / Q000453:epidemiology / Q000209:etiology; D003922:Diabetes Mellitus, Type 1 / Q000150:complications*; D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003925:Diabetic Angiopathies / Q000453:epidemiology / Q000209:etiology; D003928:Diabetic Nephropathies / Q000453:epidemiology / Q000209:etiology; D003930:Diabetic Retinopathy / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008269:Macular Edema / Q000453:epidemiology / Q000209:etiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D013030:Spain / Q000453:epidemiology; D055815:Young Adult