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Development of a Novel Self-administered Cognitive Assessment Tool and Normative Data for Older Adults

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Background:

Preexisting cognitive impairment in surgical patients is one of the leading risk factors for adverse cognitive outcomes such as postoperative delirium and postoperative cognitive dysfunction. We developed a self-administered tablet computer application intended to assess the individual risk for adverse postoperative cognitive outcomes. This cross-sectional study aimed to establish normative data for the tool.

Materials and Methods:

Healthy volunteers aged 65 years and above were administered the Mini-Mental State Examination, Geriatric Depression Scale, and Consortium to Establish a Registry for Alzheimer’s Disease-Neuropsychological Assessment Battery to assess cognitive health. All subjects completed the tablet computer application without assistance. Primary outcome measure was the test performance. Regression models were built for each cognitive domain score with the covariates age, sex, and education in cognitively healthy subjects. Demographically adjusted standard scores (z-scores) were computed for each subtest.

Results:

A total of 283 participants (155 women, 128 men) were included in the final analysis. Participants’ age was 73.8±5.2 years (mean±SD) and their level of education was 13.6±2.9 years. Mini-Mental State Examination score was 29.2±0.9 points, Geriatric Depression Scale score was 0.4±0.7 points, and Consortium to Establish a Registry for Alzheimer’s Disease-Neuropsychological Assessment Battery total score was 98.7±5.7 points. Older age was associated with poorer performance in the visual recognition task and in Trail Making Test B (P<0.05 after Bonferroni-Holm adjustments).

Conclusions:

This study provides normative data for a novel self-administered tablet computer application that is ultimately designed to measure the individual risk for adverse postoperative cognitive outcomes in elderly patients.
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Keywords: assessment; cognitive function; normative data; postoperative cognitive dysfunction; postoperative delirium; tablet computer application

Document Type: Research Article

Affiliations: 1: Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, University of Basel 2: Department of Internal Medicine, Kantonsspital Baselland, Liestal, Switzerland 3: Department of Mathematics and Technology, University of Applied Sciences Koblenz, Remagen, Germany 4: Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, University of Basel, Memory Clinic, University Center for Medicine of Aging Basel, Felix Platter Hospital 5: Memory Clinic, University Center for Medicine of Aging Basel, Felix Platter Hospital 6: Department of Anesthesia, Surgical Intensive Care, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, University of Basel, Department of Clinical Research, University of Basel, Basel

Publication date: April 1, 2019

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