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Table 3 Inter-and intraobserver variability

From: Kinematic analysis of diastolic function using the freely available software Echo E-waves – feasibility and reproducibility

3A Intraobserver Interobserver
  CV (%) Difference (%) SD ICC CV (%) Difference (%) SD ICC
c 13.2 12.6 9.8 0.80 11.6 9.8 6.1 0.92
k 9.3 9.1 7.3 0.93 14.0 9.0 8.3 0.88
x 0 6.6 4.7 4.8 0.95 5.9 4.7 4.6 0.96
Vmax 5.1 3.3 4.0 0.98 4.0 3.0 2.6 0.99
Edec 11.1 7.6 7.5 0.92 11.8 9.1 6.2 0.93
VTI 6.0 4.1 4.2 0.96 5.3 4.3 3.4 0.97
Tau 11.7 8.9 8.4 0.88 13.3 10.2 6.7 0.91
KFEI 2.7 2.6 2.0 0.89 2.5 2.2 1.9 0.91
c2 − 4k 18.7 18.9 30.1 0.92 14.3 16.2 14.7 0.95
Energy 14.6 13.7 9.6 0.94 10.6 9.8 6.4 0.98
Peak driving force 10.7 9.8 8.1 0.92 10.6 8.1 6.0 0.95
Peak resistive force 14.6 13.5 10.6 0.85 12.9 10.6 7.2 0.93
M 15.3 12.1 8.3 0.51 23.7 17.7 20.8 0.16
B 44.7 39.5 32.6 0.37 51.1 37.0 38.7 0.32
3B Intraobserver Interobserver
  CV (%) Difference (%) SD ICC CV (%) Difference (%) SD ICC
c 13.6 12.5 10.6 0.80 11.6 10.4 5.3 0.93
k 9.0 8.6 6.8 0.94 13.7 9.2 7.7 0.88
x 0 5.5 3.9 4.8 0.96 5.5 4.3 4.5 0.96
Vmax 2.4 2.3 1.9 0.99 3.8 3.0 2.5 0.99
Edec 9.7 6.9 7.1 0.94 11.5 7.9 6.6 0.94
VTI 4.0 2.9 3.1 0.98 5.1 4.2 3.2 0.97
Tau 10.7 8.6 8.0 0.90 13.1 8.8 7.1 0.92
KFEI 2.9 2.6 2.3 0.88 2.6 2.4 1.8 0.91
c2 − 4 k 17.9 15.8 25.0 0.93 12.7 13.1 11.9 0.96
Energy 16.0 14.2 11.0 0.93 10.9 9.7 6.5 0.98
Peak driving force 11.0 10.5 8.5 0.91 10.8 8.2 5.9 0.94
Peak resistive force 15.7 14.5 11.8 0.83 13.3 10.9 6.9 0.93
M 15.4 12.1 8.3 0.61 13.5 10.2 11.2 0.71
B 44.7 39.5 32.6 0.51 27.9 19.6 19.9 0.83
  1. 3A are the results obtained when observers were free to choose which E-waves to analyse from each set. 3B are the results obtained when comparing only those E-waves which both observers had analyzed. For c2-4 k, the coefficient of variation (CV) and percentage difference are given as positives for ease of comparison, although they are negative values mathematically. Vmax E-wave peak velocity, Edec E-wave deceleration time, VTI velocity time integral, KFEI kinematic filling efficiency index