title: [Screening of cognitive impairment in the old and old-old population with the 3-CT scale].
abstract: OBJECTIVE
  To determine sensitivity and specificity of the 3-CT scale, a combination of 3 simple and minimum cost tests, for screening purposes in old and old-old patients in comparison to the Montreal Cognitive Assessment (MoCA) and Mini-Mental State Examination (MMSE).
  
  
  METHODS
  The study included 106 patients. Assessment of sensitivity and specificity of neuropsychological testing with ROC-curves was used.
  
  
  RESULTS
  MoCA showed moderate sensitivity (0.65) and specificity (0.78), with cutoffs interval <19. When adjusted for education, the sensitivity increased to 96.7% while specificity decreased to 2.9%. The same result was observed for MMSE (sensitivity 0.65; specificity 0.72). All subtests of 3-CT showed moderate sensitivity and specificity, but the sum of 3 subtest scores (delaying recall in visual memory test, clock drawing test and semantic fluency test) demonstrated good sensitivity (0.833) and specificity (0.944).
  
  
  CONCLUSIONS
  3-CT is a simple and effective instrument for screening of cognitive impairment in the old and old-old population.
authors.affiliation: Hospital of Veterans of War #1, Moscow, Russia; Russian Medical Academy of Postgraduate Educational Studies, Moscow, Russia.
authors.forename: D A
authors.initials: DA
authors.lastname: Gutorova
authors.affiliation: Russian Medical Academy of Postgraduate Educational Studies, Moscow, Russia.
authors.forename: E E
authors.initials: EE
authors.lastname: Vasenina
authors.affiliation: Russian Medical Academy of Postgraduate Educational Studies, Moscow, Russia.
authors.forename: O S
authors.initials: OS
authors.lastname: Levin