Table 1

Performance of self-reported best practice procedure components

Best practice	CMS (%) (n=22)	IAC (%) (n=6)	Overall (%) (n=28)	Fisher’s exact comparing CMS versus IAC p value	95% CI of the frequencies
Best practice	CMS (%) (n=22)	IAC (%) (n=6)	Overall (%) (n=28)	Fisher’s exact comparing CMS versus IAC p value	Lower (%)	Upper (%)
mRS pre-stent	36	100	50	0.01	20	80
NIHSS pre-stent	77	100	82	0.55	−18	43
DSA including head and neck pre-stent	77	66	75	0.62	−21	49
Electronic calliper determination of per cent stenosis	32	100	46	0.005	24	84
Measure per cent stenosis using NASCET criteria	68	100	75	0.29	−10	53
Embolic protection device use	91	100	93	1.00	−31	28
DSA including head and neck post-stent	73	83	75	1.00	−32	36
Treated with antiplatelet dual regimen	82	100	86	0.55	−22	39
ACT >250 s	55	100	64	0.05	2	65
NIHSS 24 hours post-stent	77	100	82	0.55	−18	43
~30-day post-stent neurological assessment	82	100	86	0.55	−22	39
~30-day post-stent follow-up mRS	64	100	71	0.14	−6	57
~30-day post-stent follow-up NIHSS	64	100	71	0.14	−6	57
~30-day post-stent outcomes stroke and death	73	100	79	0.29	−14	48
~30-day non-invasive study	59	100	68	0.14	−2	59
Benchmark for stroke and death	50	100	61	0.03	7	69
Overall	66	97	73	< 0.001	24	36

ACT, activated clotting time; CMS, Centers for Medicare and Medicaid Service; DSA, digital subtracted angiography; IAC, Intersocietal Accreditation Commission; mRS, Modified Rankin Scale; NASCET, North American Symptomatic Carotid Endarterectomy Trial; NIHSS, National Institute of Health Stroke Scale.