Table 2.

CT measured parameters

Variables	Mean ± standard deviation	Median [IQR: 25th, 75th percentile]
Access angle (degrees)	42 ± 11	40 [34, 49]
Distance from incision (mm)	86 ± 12	86 [77, 95]
Calcium volume (mm3)	6.9 · 10 2 ± 5.1 · 102	6.0 · 102 [2.8, 9.2] · 102
Annulus minimum diameter (mm)	23.8 ± 3.3	23.3 [21.4, 26.0]
Annulus maximum diameter (mm)	29.1 ± 4.1	27.8 [27.0, 30.5]
Annulus area (mm2)	5.5 · 102 ± 1.8 · 102	5.1 · 102 [4.4, 6.1] · 102
Annulus perimeter (mm)	8.5 · 101 ± 1.2 · 101	8.2 [7.0, 11] · 101