Table 2.

Assessment of intraobserver and interobserver variability with intraclass correlation coefficients

Variable	Intraobserver variability (n = 53)	Interobserver variability (n = 10)
Circumferential strain	0.833 (0.73–0.90)	0.836 (0.49–0.96)
Circumferential strain rate	0.935 (0.89–0.96)	0.855 (0.54–0.96)
Radial strain	0.534 (0.30–0.71)	0.815 (0.45–0.95)
Radial strain rate	0.488 (0.25–0.67)	0.859 (0.56–0.96)
Longitudinal strain	0.859 (0.76–0.92)	0.857 (0.52–0.97)
Longitudinal strain rate	0.921 (0.86–0.96)	0.860 (0.53–0.96)

Data are expressed as intraclass correlation coefficient (95% confidence interval).