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Table 4 Comparison of PWV between the four groups calculated using tonometry with an external tape measure technique or an arterial centerline technique for the distance measurement, and separately using MRI

From: Effects of inaccuracies in arterial path length measurement on differences in MRI and tonometry measured pulse wave velocity

PWV technique

Group 1

CVD+ DM+

Group 2

CVD- DM+

Group 3

CVD+ DM-

Group 4

CVD- DM-

p

cf-PWVEXT (ms−1)

11.3 ± 3.0

11.2 ± 2.7

11.1 ± 2.4

10.2 ± 2.4

0.25

cf-PWVMRA (ms−1)

9.2 ± 2.3

9.2 ± 1.9

9.7 ± 2.1

8.8 ± 1.8

0.5

MRI-PWV (ms−1)

9.2 ± 2.3

7.6 ± 2.4

9.2 ± 3.6

6.7 ± 1.6

0.09

  1. Cf = carotid-femoral; MRA = distance measured using arterial centrelines obtained on whole body magnetic resonance angiography; MRI = Magnetic resonance imaging; PWV = Pulse wave velocity; EXT = distance measured using an external tape measure technique