NEFL and ischemic stroke: NF-L levels in ischemic stroke patients were negatively correlated with SSS (Spearman's rho = −0.38, p = 0.002) and positively correlated with mRS (Spearman's rho = 0.47, p < 0.001), but did not correlate to time after symptom onset (Spearman's rho = −0.07, p = 0.72).