Additionally, GAP-43 concentration decreased significantly starting 9 days after stroke relative to baseline (relative change: − 0.6% per day, 95% CI [0.3, 1.2]; F1,38 = 4.5, P = 0.04) and absolute GAP-43 concentrations also decreased significantly over the same period (absolute change: − 30.2 pg/mL per day, 95% CI [− 5.7, − 54.7]; F1,38 = 6.2, P = 0.02). Here, GAP43 is linked to Stroke.