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Full-Length Research Report

Cross-Validation of the Newly-Normed SKT for the Detection of MCI and Dementia

Published Online:August 31, 2016https://doi.org/10.1024/1662-9647/a000154

Abstract

Abstract. New regression-based norms for the SKT Short Cognitive Performance Test were introduced but have not been cross-validated for the detection of mild cognitive impairment (MCI) and dementia. We examined 562 (59.6% female) community-dwelling persons (mean age = 75.8, SD = 5.5) at baseline and followed up with up to three annual visits. Participants were classified as being healthy, with MCI, or with dementia according to the Clinical Dementia Rating (CDR) and the SKT. Overall congruency between the ratings was 57.8%. The correlation between SKT and MMSE scores reached r = –0.67. Sensitivity and specificity for MCI and dementia were 0.89 and 0.60 as well as 0.83 and 0.84, respectively. The SKT detected cognitive decline at early stages but produced increased rates of false positives.

References

  • Abdel-Aziz, K., & Larner, A. J. (2015). Six-item cognitive impairment test (6CIT): Pragmatic diagnostic accuracy study for dementia and MCI. International Psychogeriatrics, 27, 991–997. First citation in articleCrossref, Google Scholar

  • Bickel, H., Mösch, E., Seigerschmidt, E., Siemen, M., & Förstl, H. (2006). Prevalence and persistence of mild cognitive impairment among elderly patients in general hospitals. Dementia and Geriatric Cognitive Disorders, 21, 342–250. First citation in articleCrossref, Google Scholar

  • Crawford, J. R., & Garthwaite, P. H. (2006). Comparing patients’ predicted test scores from a regression equation with their obtained scores: A significance test and point estimate of abnormality with accompanying confidence limits. Neuropsychology, 20, 259–271. First citation in articleCrossref, Google Scholar

  • Dong, Y. H., Lee, W. Y., Basri, N. A., Collinsin, S. L., Merchant, R. A., Venketasubramanian, N., & Chen, C. L. (2012). The Montreal Cognitive Assessment is superior to the Mini-Mental State Examination in detecting patients at higher risk of dementia. International Psychogeriatrics, 24, 1749–1755. First citation in articleCrossref, Google Scholar

  • Erzigkeit, H. (2001). Kurztest zur Erfassung von Gedächtnis- und Aufmerksamkeitsstörungen, SKT-Manual [A short test for the assesment of deficits of cognition and attention – SKT manual]. Herzogenaurach, Germany: Geromed. First citation in articleGoogle Scholar

  • Erzigkeit, H., & Lehfeld, H. (2010). Die Bayer ADL-Skala (B-ADL), ein Screening-Instrument für Demenz-Erkrankungen sowie zur Erfassung von Beeinträchtigungen der Alltagskompetenz [The Bayer ADL-Scale, a screening instrument for dementia as well as for impairments in activities of daily living]. Frankfurt am Main, Germany: Pearson. First citation in articleGoogle Scholar

  • Erzigkeit, H., Lehfeld, H., Peña-Casanova, J., Bieber, F., Yekrangi-Hartmann, C., Rupp, M., ... Hindmarch, I. (2001). The Bayer-Activities of Daily Living Scale: Results from a validation study in three European countries. Dementia and Geriatric Cognitive Disorders, 12, 348–358. First citation in articleCrossref, Google Scholar

  • Folstein, M. F., Folstein, S. E., & McHugh, P. R. (1975). Mini Mental State – A practical method for grading the cognitive status of patients for the clinician. Journal of Psychiatric Research, 12, 189–198. First citation in articleCrossref, Google Scholar

  • Hughes, C. P., Berg, L., Danziger, W. L., Coben, L. A., & Martin, R. L. (1982). A new clinical scale for the staging of dementia. British Journal of Psychiatry, 140, 566–572. First citation in articleCrossref, Google Scholar

  • de Jager, C., Milwain, E., & Budge, M. (2002). Early detection of isolated memory deficits in the elderly: The need for more sensitive neuropsychological tests. Psychological Medicine, 32, 483–491. First citation in articleCrossref, Google Scholar

  • Jorm, A. F. (1994). A short form of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE): Development and cross-validation. Psychological Medicine, 24, 145–153. First citation in articleCrossref, Google Scholar

  • Lehfeld, H., & Erzigkeit, H. (1997). The SKT – a short cognitive performance test for assessing deficits of memory and cognition. International Psychogeriatrics, 9, 115–121. First citation in articleCrossref, Google Scholar

  • Lehfeld, H., & Erzigkeit, H. (2005). Die Störungsgradsensitivität des SKT: Ein Literaturüberblick [The sensitivity to cognitive impairment of the SKT Short Test – A literature survey]. Zeitschrift für Gerontopsychologie & -psychiatrie, 18, 131–141. First citation in articleLink, Google Scholar

  • Manos, P. J. & Wu, R. (1994). The ten point clock test: A quick screen and grading method for cognitive impairment in medical and surgical patients. International Journal of Psychiatry in Medicine, 24, 229–244. First citation in articleCrossref, Google Scholar

  • Nasreddine, Z. S., Philips, N. A., Bédirian, V., Charbonneau, S., Whitehead, V., Collin, I., ... Chertkow, H. (2005). The Montreal Cognitive Assessment, MoCA: A brief screening tool for mild cognitive impairment. Journal of the American Geriatrics Society, 53, 695–699. First citation in articleCrossref, Google Scholar

  • Roth, M., Tym, E., Mountjoy, C. Q., Huppert, F. A., Hendrie, H., Verma, S., & Goddard, R. (1986). CAMDEX: A standardized instrument for the diagnosis of mental disorder in the elderly with special reference to the early detection of dementia. British Journal of Psychiatry, 149, 698–709. First citation in articleCrossref, Google Scholar

  • Stemmler, M., Lehfeld, H., & Horn, R. (2015). SKT nach Erzigkeit – SKT Manual Edition 2015 [SKT according to Erzigkeit – SKT manual edition 2015]. Erlangen, Germany: Geromed. First citation in articleGoogle Scholar

  • Stemmler, M., Lehfeld, H., Siebert, J., & Horn, R. (in press). Ein kurzer Leistungstest zur Erfassung von Störungen des Gedächtnisse und der Aufmerksamkeit – SKT Manual Edition 2015 – und der regressionsbasierte Ansatz [A short performance test for the assessment of impairments in cognitive performance and information processing – SKT manual edition 2015 – and the continuous norming approach]. Diagnostica. First citation in articleGoogle Scholar

  • Trzepacz, P. T., Hochstetler, H., Wang, S., Walker, B., & Saykin, A. J. for the Alzheimer’s Disease Neuroimaging Initiative. (2015). Relationship between the Montreal Cognitive Assessment and Mini-Mental State Examination for assessment of mild cognitive impairment in older adults. BMC Geriatrics, 15, 107–116. First citation in articleCrossref, Google Scholar

  • Yesavage, A. A., & Sheikh, J. I (1986). 9/Geriatric Depression Scale: Recent evidence and development of a shorter version. The Gerontologist, 5, 165–173. First citation in articleCrossref, Google Scholar

  • Zaudig, M., & Hiller, W. (1996). SIDAM-Handbuch. Strukturiertes Interview für die Diagnose einer Demenz vom Alzheimer Typ, der Multi-Infarkt- (oder vaskulären) Demenz und Demenzen anderer Ätiologien nach DSM-III-R, DSM-IV und ICD-10 [SIDAM. A structured interview for the diagnosis of dementia of the Alzheimer type, multi-infarct dementia and dementias of other aetiology according to ICD-10 and DSM-III-R]. Bern: Huber. First citation in articleGoogle Scholar