ROS, MAP, MARS, Clinical Core, LATC
We formed a composite measure of the cognitive domain perceptual speed by converting raw scores on each cognitive test to z scores, using the mean and standard deviation of the cohort, and then averaging the z scores to yield the composite.
The following 4 cognitive tests are used to compute this score:
|test score||z-score||cognitive test|
|cts_sdmt||z_SDMT||symbol digits modality test (oral)|
|cts_stroop_cname||z_cname||stroop color naming|
|cts_stroop_wread||z_wread||stroop word reading|
Item level variables are available upon request.
Note: The variable is calculated if more than half the z-scores are non-missing.