Table 4.

Intraobserver and interobserver correlation coefficient (r) and Confidence intervel of measurements of the aortic annulus diameter by different imaging modalities.

	Interobserver correlation		Intraobserver correlation
	Correlation	95% CI	Correlation	95% CI
2D systolic	r = 0.71	0.58 to 0.80	r = 0.92	0.87 to 0.95
2D annular	r = 0.63	0.47 to 0.77	r = 0.95	0.92 to 0.97
3D minimum vertical	r = 0.92	0.88 to 0.95	r = 0.97	0.95 to 0.98
3D maximum diameter	r = 0.88	0.82 to 0.92	r = 0.96	0.93 to 0.97
3D annular area	r = 0.87	0.80 to 0.92	r = 0.94	0.90 to 0.96
CT minimum diameter	r = 0.90	0.85 to 0.94	r = 0.96	0.95 to 0.98
CT maximum diameter	r = 0.85	0.78 to 0.91	r = 0.94	0.91 to 0.96