Article Figures & Data
Figures
- Fig 1.
Scoring system.
A, Grade 1. Small dot of calcification 1 mm thick is present in the left CCA wall. Grades for this plaque are 1 for extent and 1 for thickness.
B, Grade 2. CT scan of the right CCA shows an atherosclerotic, calcified plaque that is crescentic but <90° of the vascular circumference. Grades are 2 for extent and 1 (1 mm) for thickness.
C, Grade 3. Circumferential involvement of the right CCA calcification is 90° but <270°; therefore, the grade is 3 for extent.
D, Grade 4. Both carotid arteries show complete circumferential involvement with atherosclerotic plaque, hence grade 4.
Tables
Grade Calcification Extent Thickness (mm) 0 None 0 1 Dot 1 2 <90° of carotid wall circumference 2 3 90–270° of circumference 3 4 270–360° of circumference >3 Data MCA Group (n = 40) Non-MCA Group (n = 34) Control Group (n = 94) Cerebrovascular infarction Yes Yes No Patient age (y) Mean ± SD 64.3 ± 13.2 64.2 ± 13.3 63.8 ± 12.0 Range 41–86 42–83 41–86 CT Score and Thickness (mm) MCA Group (n = 40) Non-MCA Group (n = 34) Control Group (n = 94) Left Right Left Right CT score 0 12 14 10 10 27 CT score 1 1 7 4 8 6 18 2 0 2 3 3 6 3 0 0 0 0 0 4 NA NA 1 0 NA CT score 2 1 5 1 0 3 7 2 2 5 0 2 5 3 0 0 0 1 0 4 NA NA NA NA 0 5 NA NA NA NA 2 CT score 3 1 2 5 3 3 10 2 3 1 3 3 4 3 1 0 1 0 2 4 1 0 NA NA NA Ct score 4 1 2 4 0 1 7 2 3 3 4 2 4 3 2 1 1 0 1 4 NA NA NA NA 1 Grade and Group Mean Maximum CT score MCA 1.73 ± 1.45 (0–4) 1.98 ± 1.53 (0–4) Non-MCA 1.53 ± 1.37 (0–4) 1.74 ± 1.46 (0–4) Control NA 1.62 ± 1.42 (0–4) CT thickness (mm) MCA 1.05 ± 0.82 (0–3) 1.28 ± 1.04 (0–4) Non-MCA 1.13 ± 0.82 (0–3) 1.35 ± 1.01 (0–4) Control NA 1.10 ± 1.03 (0–5) CT score and thickness MCA 2.78 ± 2.16 (0–7) 3.26 ± 2.38 (0–7) Non-MCA 2.66 ± 2.04 (0–6) 3.09 ± 2.25 (0–7) Control NA 2.72 ± 2.17 (0–8) Note.—NA = not applicable; for control cases only the higher (maximum) calcification score of the left and right side was recorded.
Grade Infarction Side Contralateral Side P Value * CT score 1.5 ± 1.48 (0–4) 1.47 ± 1.49 (0–4) .76 CT thickness (mm) 1.15 ± 1.09 (0–4) 0.97 ± 0.90 (0–4) .67 CT score and thickness 2.68 ± 2.40 (0–7) 2.44 ± 2.21 (0–7) .50 Note.—Data are the value ± SD (range).
* Fisher exact test.
Comparison and Calcification Criterion P Value Mann-Whitney Test, Unadjusted Median Regression, Adjusted for Age All stroke vs all controls Maximum Circumference .230 .550 Thickness .089 <.001 Circumference + thickness .156 .552 Mean Circumference .881 .999 Thickness .511 .776 Circumference + thickness .873 .594 MCA stroke vs non-MCA stroke Maximum Circumference .391 .308 Thickness .194 .857 Circumference + thickness .328 .799 Mean Circumference .365 .141 Thickness .183 .309 Circumference + thickness .254 .238 MCA stroke vs MCA controls Maximum Circumference .075 .446 Thickness .107 .390 Circumference + thickness .060 .326 Mean Circumference .250 .791 Thickness .369 .999 Circumference + thickness .329 .784 Non-MCA stroke vs non-MCA controls Maximum Circumference .636 .353 Thickness .449 .999 Circumference + thickness .963 .388 Mean Circumference .272 .342 Thickness .992 .999 Circumference + thickness .395 .256
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