title: [Evaluation of endoscopic visualisation for identifying premalignant gastric lesions in a Columbian population using histopathology as a reference].
abstract: OBJECTIVE
  To evaluate the performance of endoscopic visualization in the identification of premalignant gastric lesions, with histopathological examination of biopsy samples as a reference test, in Bucaramanga, Colombia.
  
  
  METHODS
  League for the Fight Against Cancer, Bucaramanga, Colombia.
  
  
  METHODS
  Diagnostic technology evaluation with cross-sectional sampling.
  
  
  METHODS
  We calculate the sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratio (+), likelihood ratio (-), kappa index and the prevalence rate kappa.
  
  
  RESULTS
  A total of 155 patients were studied, with a mean age of 45.43 (14.15) years and an approximate male:female ratio of 2:1. The endoscopic visualization had a sensitivity of 87.84%, a specificity of 55.56%, a positive predictive value of 64.36%, a negative predictive value of 83.33%, a likelihood ratio+of 1.98, a likelihood ratio-de 0.22 and a kappa index of 0.4272, in the identification of preneoplastic lesions of the stomach in a population with a disease prevalence of 47.74%.
  
  
  CONCLUSIONS
  The endoscopic visualization of the gastrointestinal mucosa, allows a moderate and fast identification of early preneoplastic lesions, providing an opportunity of its early histopathological diagnosis.
authors.affiliation: Grupo de Investigación en Patología Estructural, Funcional y Clínica, Universidad Industrial de Santander, Bucaramanga, Colombia. pat_uis@yahoo.com
authors.forename: Julio Alexander
authors.initials: JA
authors.lastname: Díaz Pérez
authors.forename: Carlos Alberto
authors.initials: CA
authors.lastname: García Ramírez
authors.forename: Edgar Julián
authors.initials: EJ
authors.lastname: Ferreira Bohorquez
authors.forename: Luis Alejandro
authors.initials: LA
authors.lastname: Rivero Rendon
authors.forename: Javier Mauricio
authors.initials: JM
authors.lastname: Olarte Villamizar
authors.forename: Luis Carlos
authors.initials: LC
authors.lastname: Orozco Vargas
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003105:Colombia; D005260:Female; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011230:Precancerous Conditions / Q000473:pathology*; D013274:Stomach Neoplasms / Q000473:pathology*; D055815:Young Adult