Table 1.

Intraobserver reliability.

	First measure		Second measure		Mean difference [CI]	Mean relative difference [CI]	ICC [CI]
	Mean [CI]	Median [Q1–Q3]	Mean [CI]	Median [Q1–Q3]
Intima thickness mean	0.27 [0.25–0.28]	0.24 [0.18–0.33]	0.28 [0.26–0.29]	0.25 [0.18–0.33]	−0.01 [−0.01 to −0.01]	3.13% [2.29–3.98%]	0.98 [0.97–0.98]
Media thickness mean	0.08 [0.08–0.09]	0.08 [0.07–0.10]	0.09 [0.08–0.09]	0.09 [0.07–0.11]	−0.00 [−0.01 to −0.00]	4.71% [2.99–6.44%]	0.79 [0.74–0.83]
Intima-media complex area	4.04 [3.90–4.17]	3.98 [3.44–4.61]	4.23 [4.08–4.39]	4.15 [3.50–4.82]	−0.20 [−0.25 to −0.15]	3.96% [3.13–4.80%]	0.95 [0.93–0.96]
Intima area	2.98 [2.86–3.10]	2.75 [2.31–3.55]	3.11 [2.97–3.24]	2.83 [2.40–3.71]	−0.13 [−0.16 to −0.09]	3.36% [2.49–4.24%]	0.96 [0.95–0.97]
Media area	1.06 [1.01–1.10]	0.98 [0.77–1.39]	1.13 [1.08–1.17]	1.04 [0.83–1.40]	−0.07 [−0.09 to −0.05]	5.86% [4.12–7.59%]	0.88 [0.85–0.91]

CI — confidence interval; ICC — intraclass correlation coefficient