Table 5 Intra-observer agreement and reproducibility.

From: Impact of observer experience on multi-detector computed tomography aortic valve morphology assessment and valve size selection for transcatheter aortic valve replacement

 

Structural interventionalist

Imaging specialist

Cardiac surgeon

Mean Difference (SD)

ICC (95%CI)

COV (%)

Mean Difference (SD)

ICC (95%CI)

COV (%)

Mean Difference (SD)

ICC (95%CI)

COV (%)

Intra-observer

Area [mm2]

0.57 (7.63)

0.999 (0.998–1.000)

1.52

− 6.45 (35.45)

0.980 (0.950–0.992)

6.7

27.02 (33.27)

0.973 (0.856–0.992)

6.13

Area derived diameter [mm]

0.00 (0.21)

0.999 (0.997–1.000)

0.83

− 0.14 (0.89)

0.976 (0.939–0.990)

3.45

0.68 (0.83)

0.966 (0.815–0.989)

3.16

Avg. diameter [mm]

0.12 (0.41)

0.994 (0.986–0.998)

1.62

− 0.30 (1.03)

0.967 (0.917–0.987)

3.95

0.69 (0.71)

0.972 (0.770–0.992)

2.68

Perimeter [mm]

-0.01 (0.69)

0.999 (0.997–0.999)

0.86

− 0.48 (3.07)

0.970 (0.926–0.988)

3.73

2.1 (2.81)

0.962 (0.829–0.988)

3.36

SOV average diameter [mm]

-0.21 (0.62)

0.996 (0.989–0.998)

1.85

− 0.04 (0.42)

0.998 (0.995–0.999)

1.24

0.07 (0.60)

0.996 (0.989–0.998)

1.79

 

General physician

Medical student

   

Mean Difference (SD)

ICC (95% CI)

COV (%)

Mean Difference (SD)

ICC (95%CI)

COV (%)

   

Intra-observer

Area [mm2]

− 11.52 (71.95)

0.935 (0.837–0.974)

13.54

− 3.41 (61.39)

0.958 (0.893–0.983)

10.71

   

Area derived diameter [mm]

− 0.06 (0.81)

0.983 (0.957–0.993)

3.13

− 0.07 (1.46)

0.949 (0.870–0.980)

5.45

   

Average diameter [mm2]

0.14 (0.96)

0.976 (0.940–0.991)

3.66

0.02 (1.34)

0.957 (0.891–0.983)

4.99

   

Perimeter [mm2]

0.66 (2.93)

0.997 (0.944–0.991)

3.51

4.33 (8.00)

0.823 (0.518–0.932)

9.01

   

SOV average diameter [mm]

0.23 (0.98)

0.988 (0.971–0.995)

2.96

0.12 (0.89)

0.990 (0.976–0.996)

2.65

   
  1. Results are reported as mean (SD). SOV: sinus of valsalva; ICC: intraclass-correlation coefficient; CoV: coefficient of variation; SD: standard deviation; CI: confidence interval.