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. Author manuscript; available in PMC: 2008 Jun 22.
Published in final edited form as: Arch Neurol. 2002 Feb;59(2):217–222. doi: 10.1001/archneur.59.2.217

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A, Total deficit scores at day 1: Higher total deficit scores represent a greater decline in performance. The cutoff for significant cognitive injury (5.46 points) at day 1 is 2 SDs above the mean of the control group (2.16±1.65) and is depicted by the horizontal line. Based on this criterion, 22 patients (28%) have significant cognitive decline following CEA, compared with a control group of patients undergoing spine surgery. In the control group, lumbar spine surgeries included 21 (86%) undergoing laminectomy, 3 (12%) undergoing discectomy, and 1 (2%) undergoing microdiscectomy. B, Total deficit scores at day 30: The cutoff for significant cognitive injury (4.65 points) is 2 SDs above the mean of the control group (1.81±1.42) and is depicted by the horizontal line. Based on this criterion, 11 (23%) of 48 patients have significant cognitive decline 1 month after CEA, compared with a control group of patients undergoing spine surgery.