ROS, MAP, MARS, Clinical Core, LATC
We formed a composite measure of the cognitive domain semantic memory 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 3 cognitive tests are used to compute this score:
|test score||z-score||cognitive test|
|cts_bname||z_BName||Boston naming (15 items)|
|cts_catflu||z_CatFlu||category fluency (animals - fruits/vegetables)|
|cts_read_nart*||z_read_nart*||reading test - (10 items)|
*For the MARS study, the NART reading test is replaced with the 15-item WRAT reading test
Item level variables are available upon request.
Note: The variable is calculated if more than half the z-scores are non-missing.