Die Störungsgradsensitivität des SKT

Lehfeld, Hartmut; Erzigkeit, H.

doi:10.1024/1011-6877.18.3.131

Cited by 4 publications

(3 citation statements)

References 41 publications

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“…The Short Cognitive Performance Test (SKT; Erzigkeit, 2001) is an internationally employed instrument for the measurement of memory and attention (Lehfeld & Erzigkeit, 1997) that is available in five parallel forms. The SKT is suited for detecting mild cognitive impairment (MCI) and dementia as well as for grading the severity of cognitive impairment (Lehfeld & Erzigkeit, 2005).…”

Section: Introductionmentioning

confidence: 99%

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

2017

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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.

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Section: Introductionmentioning

confidence: 99%

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

2017

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“…Cognitive performance was assessed by means of the MMSE, a clock drawing test [36] , a verbal fluency test (number of animals within 60 seconds), and the SKT. First published in the seventies [37] , the SKT is a validated and internationally used test [38] that has been shown to be sensitive to cognitive impairment in MCI and dementia [39] and correlate well with other established measures, as the MMSE and the clock test [40] . The SKT is especially suited for the purpose of the present study and was, therefore, chosen as main instrument to examine the present research question with.…”

Section: Methodsmentioning

confidence: 99%

“…Second, practice effects in a longitudinal design are reduced due to the availability of five parallel versions. Third, the SKT has been recommended for the assessment of attention and memory in MCI and mild dementia [39] .…”

Section: Methodsmentioning

confidence: 99%

Age-Correction of Test Scores Reduces the Validity of Mild Cognitive Impairment in Predicting Progression to Dementia

et al. 2014

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ObjectivesA phase of mild cognitive impairment (MCI) precedes most forms of neurodegenerative dementia. Many definitions of MCI recommend the use of test norms to diagnose cognitive impairment. It is, however, unclear whether the use of norms actually improves the detection of individuals at risk of dementia. Therefore, the effects of age- and education-norms on the validity of test scores in predicting progression to dementia were investigated.MethodsBaseline cognitive test scores (Syndrome Short Test) of dementia-free participants aged ≥65 were used to predict progression to dementia within three years. Participants were comprehensively examined one, two, and three years after baseline. Test scores were calculated with correction for (1) age and education, (2) education only, (3) age only and (4) without correction. Predictive validity was estimated with Cox proportional hazard regressions. Areas under the curve (AUCs) were calculated for the one-, two-, and three-year intervals.Results82 (15.3%) of initially 537 participants, developed dementia. Model coefficients, hazard ratios, and AUCs of all scores were significant (p<0.001). Predictive validity was the lowest with age-corrected scores (−2 log likelihood = 840.90, model fit χ2 (1) = 144.27, HR = 1.33, AUCs between 0.73 and 0.87) and the highest with education-corrected scores (−2 log likelihood = 815.80, model fit χ2 (1) = 171.16, HR = 1.34, AUCs between 0.85 and 0.88).ConclusionThe predictive validity of test scores is markedly reduced by age-correction. Therefore, definitions of MCI should not recommend the use of age-norms in order to improve the detection of individuals at risk of dementia.

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Vorhersage von Demenzerkrankungen mit dem Syndrom-Kurztest (SKT)

Bickel

Mösch

Förstl

2007

Zeitschrift für Gerontopsychologie & -psychiatrie

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Zusammenfassung: Demenzen kündigen sich zumeist durch leichte kognitive Störungen an. In der vorliegenden Prospektivstudie an 546 nichtdementen Probanden im Alter zwischen 65 und 85 Jahren wurde die Validität des SKT für die Vorhersage von Demenzerkrankungen untersucht. Initial wurde die kognitive Leistung mit dem SKT gemessen und in drei Follow-up-Untersuchungen mit jeweils einjährigem Abstand voneinander wurden die Neuerkrankungen an Demenz diagnostiziert. Eine geringe Leistung im SKT war eng mit dem Demenzrisiko assoziiert. Innerhalb von drei Jahren entwickelten sich in den beiden Teilnehmergruppen mit der geringsten Testleistung bei 35 % bzw. bei 60 % eine Demenz. Die jährlichen Konversionsraten betrugen 16 % bzw. 32 %, während sich die Inzidenz in der Gruppe der Testbesten auf lediglich 0.4 % pro Jahr belief. Der SKT scheint überaus gut für die Identifikation der präklinischen Stadien einer Demenz und für die praktische Anwendung geeignet zu sein.

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Die Störungsgradsensitivität des SKT

Cited by 4 publications

References 41 publications

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

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

Age-Correction of Test Scores Reduces the Validity of Mild Cognitive Impairment in Predicting Progression to Dementia

Vorhersage von Demenzerkrankungen mit dem Syndrom-Kurztest (SKT)

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