title: Validation of the Spanish Version of the Addenbrooke's Cognitive Examination-Revised (ACE-R).
abstract: BACKGROUND
  The Addenbrooke's Cognitive Examination Revised (ACE-R) is an improved version of the earlier brief screening test which has been validated in English with high sensitivity and specificity to detect cognitive dysfunction. The aim of this study was to validate the Spanish version of the ACE-R in an Argentine population.
  
  
  METHODS
  A group of patients with Alzheimer Disease (AD) and patients with behavioural variant Frontotemporal Dementia (bvFTD) paired by age, sex, and years of education with healthy controls were assessed using the ACE-R. Stage of dementia was measured with the Clinical Dementia Rating Scale (CDR). The English version of the ACE-R was first translated into Spanish and then back-translated into English by two blind independent experts.
  
  
  RESULTS
  Internal reliability was very good (Cronbach's alpha=0.89). Concurrent validity, determined by the correlation between total ACE-R and CDR was significant (P<.001) and inter-rater reliability was excellent (Cohen's kappa=0.98). Controls significantly outperformed AD and bvFTD patients on most subdomains of the ACE-R, with significant differences between the dementia groups. With a cut-off score of 85 points, sensitivity was 97.5% and specificity was 88.5%, with a likelihood ratio of 99.3 for the detection of dementia. The ACE-R showed higher sensitivity than the MMSE for the detection of dementia.
  
  
  CONCLUSIONS
  The Spanish version of the ACE-R is a brief yet reliable screening tool for the detection of early cognitive impairment and has shown to discriminate between bvFTD and AD.
authors.affiliation: Instituto de Neurología Cognitiva, Buenos Aires, Argentina. ttorralva@ineco.org.ar
authors.forename: T
authors.initials: T
authors.lastname: Torralva
authors.forename: M
authors.initials: M
authors.lastname: Roca
authors.forename: E
authors.initials: E
authors.lastname: Gleichgerrcht
authors.forename: A
authors.initials: A
authors.lastname: Bonifacio
authors.forename: C
authors.initials: C
authors.lastname: Raimondi
authors.forename: F
authors.initials: F
authors.lastname: Manes
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000175:diagnosis; D001118:Argentina; D003072:Cognition Disorders / Q000175:diagnosis*; D057180:Frontotemporal Dementia / Q000175:diagnosis; D006801:Humans; D007802:Language; D009483:Neuropsychological Tests / Q000592:standards*; D011594:Psychometrics; D012372:ROC Curve; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013030:Spain