Table 1.

Patient group randomization by time of tPA treatment from stroke onset.

hours from stroke	Group	Patients(n)	tPA	HY
0–3	1	22	+	−
	2	22	+	+
3–6	3	6	−	−
	4	2	+	−
	5	4	−	+
	6	2	+	+
total		58