Table 3:

Clinical outcomes, secondary end points, and HT in patients undergoing Merci thrombectomy for acute ischemic stroke^a

	Age <80 yr (n = 75)	Age ≥80 yr (n = 31)	P^b	Age 65–79 yr (n = 33)	P^b
Admission NIHSS	18 (13–22)	20 (18–23)	.1	17 (15–23)	.3
Hospital length of stay (days)^c	10.4 ± 8.0	8.3 ± 5.0	.3	6.2 ± 3.0	.1
Stroke-related death	11 (15)	15 (48)	5.5 (2.1–14.1)	8 (24)	2.9 (1.0–8.5)
Discharge NIHSS	6.5 (2–42)	42 (6–42)	.006	11 (3–42)	.09
Discharge NIHSS in survivors^d	5 (2–12)	5.5 (2–11)	1	4 (0–11)	.8
NIHSS change	4.2 ± 14.4	−4.9 ± 16.9	.01	1.7 ± 15.8	.1
NIHSS change in survivors^d	9.4 ± 8.6	10.4 ± 5.5	.7	10.1 ± 7.5	.9
Discharge mRS	4 (1–5)	5 (3.5–6)	.006	3 (0.5–4)	.1
Discharge mRS in survivors^d	3 (1–4)	3.5 (2–4)	.9	2 (0–4)	.7
mRS ≤2 in survivors^d	25/62 (40)	6/16 (38)	.9 (.3–2.8)	11/23 (48)	0.7 (.2–2.4)
HT^e
Any HT within 72 hr	30/72 (42)	17/28 (61)	2.2 (.9–5.3)	13/30 (43)	2.0 (.7–5.8)
Symptomatic HT within 72 hr	7/72 (10)	3/28 (11)	.9 (.2–3.7)	2/30 (7)	1.7 (.3–10.9)
Parenchymal HT within 72 hr	9/72 (13)	4/28 (14)	1.2 (.3–4.1)	3/30 (10)	1.5 (.3–7.4)

a Clinical measure, No. (%) unless otherwise specified; all NIHSS and mRS values except NIHSS change are shown as median (interquartile range).
b ORs (95% CI) are shown for selected comparisons.
c One patient with a prolonged hospitalization due to surgery unrelated to the stroke was excluded from LOS analysis.
d Patients who died were not analyzed in these comparisons.
e Three patients in each group did not undergo imaging by 72 hours to determine HT.