Table 1.

Baseline demographic data for patients with different stages.

Variable	Hyperacute stage (0–6 h)	Acute stage (6–48 h)	Early subacute stage (48–96 h)	Late subacute stage (96–168 h)	P value
Age (years)a	63 ± 6	66 ± 4	58 ± 4	61 ± 2	0.587
Male/female	2/2	10/8	6/4	5/2	0.769
Onset time (h)a	4.5 ± 1.0	31.5 ± 2.9	79.2 ± 3.7	147.4 ± 6.3	<0.001

^aMean value ± SE.