The measurement of the soluble component of the P-selectin adhesion molecule. Soluble P-selection is associated with adverse cardiovascular events. Alternative terms include:\nCD62 antigen-like family member P\nGranule membrane protein 140\nGMP-140\nLeukocyte-endothelial cell adhesion molecule 3\nLECAM3\nPlatelet activation dependent granule-external membrane protein\nPADGEM