SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--diaDexus, Inc., today announced study results indicating that lipoprotein-associated phospholipase A2 (Lp-PLA2), a specific indicator of vascular inflammation, provides information over and above traditional risk factors to help identify individuals at the highest risk for ischemic stroke. The results were recently presented at the Society for Vascular Medicine and Biology 18th Annual Scientific Sessions in Baltimore.