TABLE 2.

Inter-observer variability for mitral valve measurements.

	Saddle-shaped annulus
	Diastole			Systole
	Absolute	Relative	ICC (95%CI)	Absolute	Relative	ICC (95%CI)
Area 2D	0.27 ± 0.2 cm2	2.81 ± 1.8%	0.95 [0.89–0.98]	0.28 ± 0.2 cm2	2.91 ± 1.7%	0.93 [0.80–0.98]
Perimeter 2D	2.15 ± 1.2 mm	1.85 ± 1.0%	0.90 [0.74–0.96]	2.60 ± 1.5 mm	2.21 ± 1.4%	0.82 [0.50–0.93]
Perimeter 3D	2.76 ± 1.7 mm	2.22 ± 1.3%	0.86 [0.61–0.95]	3.43 ± 1.6 mm	2.78 ± 1.4%	0.77 [0.52–0.90]
AP Diameter	1.05 ± 0.6 mm	3.62 ± 1.9%	0.81 [0.61–0.91]	0.97 ± 0.6 mm	3.21 ± 2.2%	0.73 [0.52–0.87]
ML Diameter	0.62 ± 0.4 mm	1.57 ± 1.0%	0.93 [0.83–0.97]	1.08 ± 0.6 mm	2.84 ± 1.4%	0.83 [0.46–0.94]
Annulus height	0.99 ± 0.5 mm	18.2 ± 10.0%	0.38 [0.11–0.65]	0.71 ± 0.4 mm	11.1 ± 6.1%	0.71 [0.50–0.86]
Aorto-mitral angle	3.19 ± 2.4°	2.53 ± 2.0%	0.54 [0.29–0.76]	3.31 ± 1.7°	2.79 ± 1.5%	0.70 [0.48–0.85]
TT-distance	2.34 ± 1.0 mm	10.1 ± 4.7%	0.23 [0.00–0.51]	2.29 ± 1.0 mm	10.1 ± 4.7%	0.23 [0.00–0.51]
	Saddle-shaped annulus
Area 2D	0.26 ± 0.17 cm2	2.67 ± 1.4%	0.95 [0.90–0.98]	0.26 ± 0.1 cm2	2.69 ± 1.5%	0.94 [0.86–0.98]
Perimeter 2D	1.69 ± 1.01 mm	1.46 ± 0.8%	0.94 [0.87–0.97]	1.68 ± 0.9 mm	1.46 ± 0.8%	0.92 [0.80–0.97]
Perimeter 3D	2.63 ± 1.51 mm	2.19 ± 1.2%	0.87 [0.76–0.94]	2.50 ± 1.2 mm	2.11 ± 1.1%	0.87 [0.73–0.94]
AP Diameter	0.66 ± 0.32 mm	2.33 ± 1.1%	0.90 [0.80–0.95]	0.87 ± 0.5 mm	2.96 ± 1.6%	0.81 [0.61–0.91]
ML Diameter	0.74 ± 0.40 mm	1.86 ± 0.9%	0.91 [0.75–0.96]	1.03 ± 0.7 mm	2.70 ± 1.8%	0.81 [0.46–0.93]
Annulus height	0.96 ± 0.59 mm	27.39 ± 16.4%	0.23 [0.00–0.52]	1.22 ± 0.7 mm	30.21 ± 14.4%	0.26 [0.01–0.54]
Aorto-mitral angle	3.48 ± 2.67°	2.74 ± 2.2%	0.55 [0.27–0.77]	3.83 ± 1.9°	3.18 ± 1.7%	0.67 [0.44–0.84]
TT-distance	2.34 ± 1.00 mm	10.1 ± 4.7%	0.23 [0.00–0.51]	2.29 ± 1.0 mm	10.1 ± 4.7%	0.23 [0.00–0.51]

AP, antero-posterior; CI, confidence interval; ML, medio-lateral; TT, trigone-to-trigone; ICC, intraclass correlation.