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Table 2 Prevalence and concordance* of right and left common carotid artery geometries † at baseline

From: Bilateral common carotid artery ultrasound for prediction of incident strokes using intima-media thickness and external diameter: an observational study

Large parameter(s)

Number (%)

% Observed right-left

RCCA

LCCA

Agreement* (95% CI)

Men (N=3330)

   

IMT and diameter

1068 (32.1)

1074 (32.3)

41.8 (39.2-44.3)

IMT only

599 (18.0)

607 (18.2)

23.3 (20.7-26.1)

Diameter only

598 (18.0)

599 (18.0)

23.7 (21.1-26.5)

Neither

1065 (32.0)

1050 (31.5)

46.3 (43.7-48.9)

Women (N=4107)

   

IMT and diameter

1307 (31.82)

1391 (33.9)

43.3 (40.9-45.6)

IMT only

751 (18.29)

795 (19.4)

24.7 (22.3-27.4)

Diameter only

755 (18.4)

668 (16.3)

26.6 (24.2-29.2)

Neither

1294 (31.5)

1253 (30.5)

47.9 (45.6-50.2)

All (N=7437)

   

IMT and diameter

2375 (31.9)

2465 (33.2)

42.6 (40.9-44.3)

IMT only

1350 (18.2)

1402 (18.9)

24.1 (22.6-26.0)

Diameter only

1353 (18.2)

1267 (17.0)

25.3 (23.5-27.2)

Neither

2359 (31.7)

2303 (31.0)

47.2 (45.5-48.9)

  1. Women: Kappa=0.38, 95% CI 0.36-0.40; Men Kappa=0.35, 95% CI 0.33-0.38; All: Kappa=0.37, 95% CI= 0.35-0.38).
  2. *% having the characteristic in both the RCCA and LCCA if it is present on either side.
  3. † RCCA and LCCA (right and left common carotid artery) geometries are based on ultrasound measurements of IMT and diameters at baseline where large is defined as ≥ the gender- and side-specific medians for IMT and external diameter in Table 1.
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Cardiovascular Ultrasound

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