title: [Validity of the non-mydriatic camera for diabetic retinopathy screening and analysis of retinopathy risk indicators].
abstract: OBJECTIVE
  Analysis of the validity of the non-mydriatic camera in detecting diabetic retinopathy and severity levels which can be referred to the ophthalmologist. Analysis of risk indicators of diabetic retinopathy which help increase the sensitivity of the screening: development time of prolonged diabetes (more than 20 years); poor metabolic control (HbA1C > 10%).
  
  
  METHODS
  A cross-sectional study was designed to determine the validity of a diagnostic test (non-mydriatic fundus camera Topcon model TRC-NW6S). As criteria for evaluation we used validity indicators, predictive values, indicators of clinical use, and concordance.
  
  
  METHODS
  Primary Care. Patients with severe cataracts were excluded. The sample size was 376 eyes of 188 type-2 diabetic patients.
  
  
  RESULTS
  With reference to the distribution of diabetic retinopathy we found that 41.25% had a variable level of retinopathy. The validity indicators analysed improved as the number of fundus fields studied increased, obtaining sensitivity levels of greater than 75%; specificity greater than 95%; positive predictive values greater than 90% and almost perfect concordance when two or three fundus fields were used.
  
  
  CONCLUSIONS
  The analysis of retinal photography in digital format can be considered a valid method with respect to the gold standard, and the severity indicators analysed can play a guiding role in obtaining greater prevalences of derivable diabetic retinopathy, but cannot be used as an isolated test for making clinical decisions.
authors.affiliation: Hospital General Universitario de Elche, Departamento Medicina Clínica, Universidad Miguel Hernández Elche, Alicante, Spain. mbaezadi@ono.com
authors.forename: M
authors.initials: M
authors.lastname: Baeza Díaz
authors.forename: V
authors.initials: V
authors.lastname: Gil Guillén
authors.forename: D
authors.initials: D
authors.lastname: Orozco Beltrán
authors.forename: V
authors.initials: V
authors.lastname: Pedrera Carbonell
authors.forename: C
authors.initials: C
authors.lastname: Ribera Montes
authors.forename: I
authors.initials: I
authors.lastname: Pérez Pons
authors.forename: J
authors.initials: J
authors.lastname: Martínez-Toldos
mesh_terms: D003430:Cross-Sectional Studies; D003930:Diabetic Retinopathy / Q000097:blood / Q000175:diagnosis*; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D008403:Mass Screening / Q000379:methods; D010781:Photography / Q000295:instrumentation*; D015203:Reproducibility of Results; D012307:Risk Factors; D012680:Sensitivity and Specificity
chemical_list: D006442:Glycated Hemoglobin
vernacular_title: Validez de la cámara no midriática en el cribado de la retinopatía diabética y análisis de indicadores de riesgo de la retinopatía.