ROS, MAP, MARS, Clinical Core, LATC
We formed a composite measure of the cognitive domain episodic memory by converting raw scores on each cognitive test to z scores, using the mean and standard deviation of the cohort(s) at baseline visit, and then averaging the z scores to yield the composite.
The following 7 cognitive tests are used to compute this score:
|test score||z-score||cognitive test|
|cts_wlii||z_WLII||word list recall|
|cts_wliii||z_WLIII||word list recognition|
|cts_ebmt||z_EBMT||East Boston immediate recall|
|cts_ebdr||z_EBDR||East Boston delayed recall|
|cts_story||z_Story||Logical memory I (immediate recall)|
|cts_delay||z_Delay||Logical memory II (delayed recall)|
Item level variables are available upon request.
NOTE: Every time a new participant completes a study baseline, values for ALL participants change slightly. therefore it is essential that if participants are added to a data set, ALL values must be updated.
The variable is calculated if more than half the z-scores are non-missing.