Table 3

Inter- and Intra-Observer Variability of TV and PV and RV Length

Mean Difference (mm)95% Limits of Agreement (mm)Repeatability Coefficient
TVintra−0.11−0.65, +0.430.99
TVinter0.21−1.58, +2.000.92
PVintra−0.04−0.44, +0.380.99
PVinter0.09−1.43, +1.610.83
RVintra−0.26−1.91, +1.390.79
RVinter−1.74−8.93, +5.450.43

Inter = interobserver variability; intra = intraobserver variability; other abbreviations as in Table 2.