Variable Details

Available Studies

ROS, MAP, MARS, Clinical Core, LATC

Scaled? 

Scaled

Variable Type 

Cross-Sectional

Variable Name 

plaq_n

Categories

Pathology

Neuritic plaque burden
Neuritic plaque summary based on 5 regions

Neuritic plaque burden is determined by microscopic examination of silver-stained slides from 5 regions: midfrontal cortex, midtemporal cortex, inferior parietal cortex, entorhinal cortex, and hippocampus. The count of each region is scaled by dividing by the corresponding standard deviation. The 5 scaled regional measures are then averaged to obtain a summary measure for neuritic plaque burden.

Neuritic plaque pathology counts by region:

RegionVariable
Entorhinal cortexplaq_n_ec
Hippocampus (CA1)plaq_n_hip
Midtemporal cortexplaq_n_mt
Inferior parietal cortexplaq_n_ag
Midfrontal cortexplaq_n_mf
Burden across regionsplaq_n

Notes: Counts may be missing for regions (e.g., due to damage from infarct). If data are present for at least 2 of 5 regions, the summary measure for neuritic plaque burden is computed.

Item level variables are available upon request.

This variable replaces np.