CRP and Stroke: In one study,29 addition of coronary artery calcium, carotid intima media thickness, C-reactive protein, ankle-brachial index (ABI) and family history of stroke to the revised FSRS showed an improvement in the overall category-less NRI and the Integrated Discrimination Improvement (IDI) (NRI = 0.36, IDI = 0.0027), while ABI demonstrated the least (NRI = 0.11, IDI = 0.0013) improvement.