APOA1 and Stroke: The median serum APOA1-UP/LRP was 1.49 (interquartile range (IQR), 0.77) in total samples, 2.14 (IQR, 0.40) in the control group, and 1.32 (IQR, 0.44) in the stroke group, with a p value of <0.0001.