Article Figures & Data
Figures
- FIG 1.
Two exemplary cases of good and poor collaterals in patients with acute right side M1 occlusion of the middle cerebral artery (A and D, dotted arrow). Patient 1 shows no ipsilateral or contralateral stenosis of the extracranial ICA (B, straight arrow) and poor intracranial collaterals, Tan score 0 (C). Patient 2 demonstrates an ipsilateral and contralateral carotid artery disease marked with an arrow (E) with good intracranial collateralization, Tan score 3 (F).
- FIG 2.
Tan collateral score distribution in patients with ipsilateral and contralateral carotid artery disease.
Tables
Characteristic Value Age, mean ± SD (years) 73.9 ± 12.6 Female, n (%) 404 (56.9) Risk factors, n (%) Hypertension 526 (74.2) Diabetes 161 (22.7) Atrial fibrillation 267 (37.7) Time from onset to imaging, min (mean, IQR) 357 (94–390) Baseline NIHSS, median (IQR) 15 (10–20) Premorbid mRS, median (IQR) 1 (0–2) Baseline ASPECTS, median (IQR) 8 (7–10) Ipsilateral carotid stenosis grade according to NASCET, mean, median (IQR) 24.0, 0 (0–38) Contralateral carotid stenosis grade according to NASCET, mean, median (IQR) 16.3, 0 (0–30) Tan collateral score, n (%) 0 17 (2.4) 1 85 (12.0) 2 186 (26.2) 3 421 (59.4) Tan Score Ipsilateral Stenosis Grade (%) Contralateral Stenosis Grade (%) Mean Median IQR Mean Median IQR 0 12.8 0 0–8 11.3 0 0–20 1 18.4 0 0–25 11.3 0 0–0 2 19.0 0 0–29 14.7 0 0–26 3 22.8 0 0–52 18.3 0 0–35 - Table 3:
Univariate and multivariate analysis regarding the prediction of good collaterals (Tan 3)
Unadjusted OR (95% CI) P Value Adjusted OR (95% CI) P Value Age (per year) 1.0 (0.99–1.01) .684 Female 0.98 (0.72–1.32) .89 Hypertension 1.07 (0.76–1.52) .686 Diabetes 1.08 (0.76–1.56) .659 Atrial fibrillation 1.07 (0.78–1.46) .692 Premorbid mRS 0.96 (0.85–1.07) .437 Ipsilateral stenosis grade (per NASCET point) 1.01 (1.0–1.01) < .001* 1.01 (1.0–1.01) .009* Contralateral stenosis grade (per NASCET point) 1.01 (1.0–1.01) .019* 1.0 (1.0–1.01) .34 Note:—An asterisk indicates a statistically significant P value.
Ipsilateral Stenosis Grade 0%–69% Ipsilateral Stenosis Grade 70%–100% P Value Contralateral Stenosis Grade 0%–69% Contralateral Stenosis Grade 70%–100% P Value Baseline ASPECTS, median (IQR) 9 (7–10) 8 (7–9) < .001 8 (7–10) 8 (7–9) .077 Follow-up ASPECTS, median (IQR) 7 (4–8) 6 (5–8) .377 7 (5–8) 6 (4–8) .131 Infarct growth, median (IQR) 2 (1–3) 1 (0–2) .005 2 (1–3) 1 (1–4) .786 Unadjusted OR (95% CI) P Value Adjusted OR (95% CI) P Value Age (per year) 1.01 (0.99–1.02) .334 Female 1.04 (0.77–1.4) .795 Hypertension 0.98 (0.69–1.38) .895 Diabetes 1.03 (0.72–1.47) .868 Atrial fibrillation 0.93 (0.69–1.27) .653 Premorbid mRS 0.96 (0.86–1.07) .453 Ipsilateral stenosis grade (per NASCET point) 0.99 (0.99–0.99) < .001* 0.99 (0.99–1.0) .004* Contralateral stenosis (per NASCET point) 0.99 (0.99–1.00) .003* 1.0 (0.99–1.0) .355 Tan collateral score 3 0.48 (0.39–0.59) < .001* 0.5 (0.4–0.62) < .001* Note:—An asterisk indicates a statistically significant P value.
