- The serum Copeptin concentration in the acute stroke patients correlated negatively with Glasgow Coma Scale score at admission (ischemic stroke: r = - 0.564, p < 0.001 and intracerebral hemorrhage: r = - 0.466, p = 0.007). The serum Copeptin concentration in the acute stroke patients correlated negatively with Glasgow Coma Scale score after 7 days (ischemic stroke: r = - 0.499, p < 0.001 and intracerebral hemorrhage: r = - 0.38, p = 0.032).