Table 3 Average difference, Bland-Altman 95%-limits of agreement, intraclass correlation (ICC, 95% confidence interval) and Pearson correlation coefficient (PCC, 95% confidence interval using Wald methods) and the mean relative difference (MRD) of horizontal axis of the bladder (HA), sagittal axis of the bladder (SA), longitudinal axis of the bladder (LA) and post-void residual volume (PVRV) between the devices: standard ultrasound device using piezo technic and portable ultrasound device using silicon chip technic.
Average difference | 95%-Limits of agreement in cm | ICC (95%) | PCC (95%) | MRD | |
|---|---|---|---|---|---|
HA (cm) | -0,177 | -0.647 to 0.690 | 0.986 (0.978–0.991) | 0.973 (0.927–1.019) | 9% |
SA (cm) | 0.021 | -0.647 to 0.689 | 0.990 (0.985–0.993 | 0.980 (0.939–1.020) | 12% |
LA (cm) | -0.023 | -0.734 to 0.687 | 0.986 (0.979–0.991) | 0.973 (0.926–1.020) | 12% |
PVRV (ml) | -1.751 | -17.404 to 13.899 | 0.994 (0.991–0.996) | 0.982 (0.952–1.012) | 20% |
