Unlabelled: The DMS 48 is a visual recognition memory test designed to detect memory changes in early Alzheimer's disease (AD). The aim of this study was to produce normative scores for this test and to assess its psychometric properties in the detection of AD by comparison with a widely used test of verbal episodic memory: the story recall task of the Wechsler memory scale. Methods. Data were collected in a sample of 1002 agricultural retirees, aged 65 years and over, included in the AMI study, a population-based cohort conducted in Southwestern France. The sample used to establish normative data included 750 non-demented elderly while the sample used to study the properties of the test to detect AD included 751 participants whose 34 with AD. To assess AD detection accuracy, DMS 48 was compared to the Wechsler story recall task. Results. Age, sex, and education were significantly associated with DMS 48 performances. Therefore, normative scores were calculated according to sex, age, and educational level, and described by percentiles. Regarding the test properties for AD detection, DMS 48 presented a good balance between sensitivity (Se) and specificity (Sp) both for immediate (Se=70.6%; Sp=79.6%) and delayed recall (Se=79.4%; Sp=72.9%). It also showed high negative predictive values, around 98.5% for both recalls. Detection values were roughly similar to that of Wechsler story recall task.
Conclusion: The DMS 48 seems to be as reliable as the Wechsler story recall task with similar detection properties. The DMS 48 is a test easy to administer in clinical situations and could be a helpful tool for AD screening.
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