KMID : 0359719990170020253
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Journal of the Korean Neurological Association 1999 Volume.17 No. 2 p.253 ~ p.258
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A Short form of the Samsung Dementia Questionnaire (S-SDQ): development and cross-validation
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Choi Seong-Hye
Na Duk-Lyul Oh Kyung-Mi Park Byung-Joo
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Abstract
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Background : The Samsung Dementia Questionnaire(SDQ) has recently been developed for screening dementia. Objectives of this study are to develop a short form of SDQ(S-SDQ) and to cross-validate S-SDQ in d new sample.
Methods : Factorial analysis of SDQ items was used to develop the S-SDQ. The S-SDQ was administered to informants of 100 dementia patients(61 Alzheimer¡¯s disease, 39 vascular dementia) and to those of 100 hospital control subjects. Two groups were matched in terms of age and sex. The retest of S-SDQ was conducted in 75 informants to determine the reliability of tests and retests which were spanned average 23.9 days.
Results : The S-SDQ was not influenced by education, age or sex. S-SDQ scores negatively correlated with the K-MMSE(r=-0.84). The S-SDQ showed stepwise scaling with dementia severity. The area under the ROC curve for the S-SDQ was
0.974(S.E.=0.084). With respect to a diagnosis of dementia, the SDQ(cut-off point 8) had a sensitivity of 94% and a specificity of 90%. The S-SDQ was found to have a high test-retest reliability(r=0.97).
Conclusions : An abbreviated version of SDQ(S-SDQ) had high sensitivity, specificity and test-retest reliability which were comparable to those of original SDQ. Thus, the S-SDQ can be a useful, brief dementia screening questionnaire.
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KEYWORD
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Samsung dementia questionnaire(SDQ), Short form of samsung dementia questionnaire(SSDQ), Screening, Dementia
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