title: The K-T cancellation test in the older adults: Normative data and construct validity.
abstract: Since cutoff scores are necessary for differentiating normal cognitive functioning from dementia, the main objective of this study was to establish normative data of the K-T test, a standardized cancellation test. The construct validity of K-T test was also investigated. In total, 2471 cognitively intact elderly subjects from the SU.VI.MAX 2 study were included in the present study. Younger subjects, women and subjects with higher education had a higher number of correct answers and fewer omission errors. Participants made few commission errors and only the educational level was found to have a significant effect. Normative data for correct responses and efficiency were stratified by age, education, and gender. Correlation analysis showed that the K-T test was significantly correlated to validated neuropsychological tests assessing executive functions. This study permits to strengthen the utility of the K-T test to detect impairment of the executive components involved in the task.
authors.affiliation: a Assistance Publique-Hôpitaux de Paris, Service de Gérontologie Clinique, Hôpital Broca, Paris, France. yahuei.wu@brc.aphp.fr
authors.forename: Ya-Huei
authors.initials: YH
authors.lastname: Wu
authors.forename: Jocelyne
authors.initials: J
authors.lastname: de Rotrou
authors.forename: Jean-Sébastien
authors.initials: JS
authors.lastname: Vidal
authors.forename: Claude
authors.initials: C
authors.lastname: Jeandel
authors.forename: Anne-Sophie
authors.initials: AS
authors.lastname: Rigaud
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Kesse-Guyot
authors.forename: Olivier
authors.initials: O
authors.lastname: Hanon
mesh_terms: D000367:Age Factors; D000368:Aged; D003704:Dementia / Q000175:diagnosis; D004522:Educational Status; D056344:Executive Function; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D012016:Reference Values; D012737:Sex Factors