Related Experiment Video
Updated: Feb 8, 2026

Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
Clinical Utility of the Cognitive Test for Severe Dementia: Factor Analysis, Minimal Detectable Change, and
Hiroyuki Tanaka1, Yuma Nagata1, Daiki Ishimaru1
1Osaka Prefecture University Graduate School of Comprehensive Rehabilitation, Habikino City, Japan.
Aims:
This study sought to conduct additional analyses of the Cognitive Test for Severe Dementia (CTSD) using the COSMIN checklist to ensure the development of adequate outcome measures.
Methods:
The following analyses were conducted: (1) factor analyses were used to evaluate construct validity; (2) the standard error of measurement (SEM) and minimal detectable change (MDC) were assessed to evaluate reliability and interpretability; and (3) longitudinal change was assessed to evaluate responsiveness.
Results:
The CTSD factor analysis yielded 2 factors, each of which was dichotomized by the passage rate of each item. We calculated a SEM and MDC of 1.6 and 3.6 points, respectively. Finally, the mean CTSD score showed a significant reduction (p < 0.001) over time, and the change in score exceeded the SEM and MDC.
Conclusion:
Our results indicate that the CTSD could provide a reliable outcome measure in severe dementia.
More Related Videos
05:12A Mouse Model for Vascular Cognitive Impairment and Dementia Based on Needle-guided Asymmetric Bilateral Common Carotid Artery Stenosis
Published on: November 22, 2024
06:48Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment
Published on: June 25, 2019
Related Concept Videos
Longitudinal Research
Dementia
The progression of dementia is generally gradual....
Types of Errors: Detection and Minimization
Absolute error in a measurement is the numerical difference from the true or central value. Relative error is the ratio between absolute error and the true or central value, expressed as a percentage.
Errors can be classified by source, magnitude, and sign. There are three types of errors: systematic, random, and gross.
Systematic or...
Cognitive Dissonance
Global Climate Change
Longitudinal Studies