From: The reliability of the ankle-brachial index in the Atherosclerosis Risk in Communities (ARIC) study and the NHLBI Family Heart Study (FHS)
Ankle SBP
Arm SBP
Within-person covariance
   Ankle SBP
49.8
-0.0159
   Arm SBP
44.0
True/total ratio matrix
0.922
1.000
0.900