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Table 4 Comparisons of the inner diameters of the carotid arteries between different age groups

From: Inner diameters of the normal carotid arteries measured using three-dimensional digital subtraction catheter angiography: a retrospective analysis

Inner diameter measured Range (95% confidence interval) Mean ± standard deviation P
 ≤ 45 years
(n = 231)
46–55 years
(n = 276)
56–65 years
(n = 375)
 > 65 years
(n = 300)
 ≤ 45 years
(n = 231)
46–55 years
(n = 276)
56–65 years
(n = 375)
 > 65 years
(n = 300)
Left proximal carotid sinus (mm) 8.44–14.72 (11.04–12.13) 7.50–15.45 (10.85–11.89) 6.33–15.35 (10.35–11.34) 5.89–14.01 (9.47–10.43) 11.58 ± 1.59 11.37 ± 2.08 10.84 ± 2.30 9.95 ± 2.07a,b,c  < 0.001
Right proximal carotid sinus (mm) 8.71–15.13 (11.36–12.47) 7.46–16.24 (11.28–12.42) 6.81–15.79 (10.82–11.78) 6.69–14.61 (10.18–11.11) 11.92 ± 1.64 11.85 ± 2.24 11.30 ± 2.29 10.65 ± 2.02a,b,c 0.003
Left carotid sinus bulge (mm) 8.43–14.51 (10.94–11.99) 7.69–15.13 (10.94–11.88) 6.69–15.00 (10.39–11.31) 6.43–14.71 (10.08–11.06) 11.47 ± 1.55 11.41 ± 1.90 10.85 ± 2.12 10.57 ± 2.11a,b 0.036
Right carotid sinus bulge (mm) 8.26–15.74 (11.35–12.64) 7.55–15.71 (11.11–12.16) 7.27–15.35 (10.88–11.75) 7.14–14.48 (10.37–11.25) 12.00 ± 1.91 11.63 ± 2.08 11.31 ± 2.06 10.81 ± 1.87a,b 0.017
Left distal carotid sinus (mm) 6.38–10.74 (8.19–8.94) 6.45–10.25 (8.11–8.58) 5.42–9.78 (7.24–7.74) 5.14–9.84 (7.35–7.86) 8.56 ± 1.11 8.35 ± 0.97 7.60 ± 1.11a,b 7.49 ± 1.19a,b  < 0.001
Right distal carotid sinus (mm) 6.87–10.95 (8.56–9.26) 6.59–10.39 (8.25–8.73) 5.53–9.99 (7.53–7.99) 5.83–9.75 (7.57–8.02) 8.91 ± 1.04 8.49 ± 0.97 7.79 ± 1.00a,b 7.76 ± 1.14a,b  < 0.001
Left common carotid artery (mm) 8.22–12.54 (10.01–10.76) 8.22–13.56 (10.56–11.22) 8.15–13.71 (10.72–11.28) 8.53–13.47 (10.71–11.03) 10.38 ± 1.10 10.89 ± 1.36 10.93 ± 1.42a 11.00 ± 1.26a 0.122
Right common carotid artery (mm) 9.06–13.34 (10.83–11.57) 8.72–14.40 (11.20–11.91) 8.66–14.46 (11.26–11.86) 9.23–13.90 (11.29–11.82) 11.20 ± 1.09 11.56 ± 1.45 11.56 ± 1.48 11.56 ± 1.19 0.529
  1. a P < 0.05 vs. ≤ 45 years group; b P < 0.05 vs. 46–55 years group; c P < 0.05 vs. 56–65 years group