Table 2 Summary of comparisons made between measurement of the inferior vena cava (IVC) in healthy volunteers
Comparison | Variable | Mean Bias and 95% CI | LoA and 95% CI | ICC and 95% CI | ||
|---|---|---|---|---|---|---|
Lower | Upper | |||||
AI-SC | M-SC | IVCc | − 0.7% [− 4.1 to 2.7] | − 24.9% [− 30.8 to v19.1] | 23.6% [17.7 to 29.5] | 0.57 [0.36 to 0.73] |
IVC-max | − 2.5 mm [− 3.1 to − 2.0] | − 6.7 mm [− 7.7 to − 5.7] | 1.6 mm [0.6 to 2.6] | 0.83 [0.73 to 0.90] | ||
IVC-min | − 1.4 mm [− 2.1 to − 0.7] | − 6.3 mm [− 7.5 to − 5.1] | 3.5 mm [2.4 to 4.7] | 0.81 [0.69 to 0.89] | ||
AI-TH | M-TH | IVCc | 3.7% [1.0 to 6.3] | − 14.9% [− 19.5 to − 10.3] | 22.3% [17.7 to 26.8] | 0.72 [0.55 to 0.83] |
IVC-max | − 2.4 mm [− 3.2 to − 1.5] | − 8.1 mm [− 9.5 to − 6.7] | 3.4 mm [1.9 to 4.8] | 0.67 [0.49 to 0.80] | ||
IVC-min | − 2.6 mm [− 3.4 to − 1.8] | − 8.3 mm [− 9.7 to − 6.9] | 3.0 mm [1.6 to 4.4] | 0.79 [0.66 to 0.87] | ||
M-SC | M-TH | IVCc | 13.9% [9.5 to 18.3] | − 18.1% [− 25.7 to − 10.5] | 45.8% [38.3 to 53.4] | 0.08 [− 0.18 to 0.34] |
IVC-max | − 1.7 mm [2.8 to − 0.6] | − 9.6 mm [− 11.5 to − 7.7] | 6.1 mm [4.3 to 8.0] | 0.53 [0.32 to 0.70] | ||
IVC-min | − 4.4 mm [− 5.8 to − 3.0] | − 14.5 mm [− 16.9 to − 12.1] | 5.6 mm [3.2 to 8.0] | 0.38 [0.13 to 0.59] | ||
AI-SC | AI-TH | IVCc | 7.7% | − 19.2% [− 24.6 to − 15.1] | 34.6% [30.4 to 40.0] | 0.69 [0.52 to 0.81] |
IVC-max | − 2.0 mm | − 9.2 mm [− 10.9 to − 7.9] | 5.2 mm [3.9 to 6.9] | 0.45 [0.21 to 0.65] | ||
IVC-min | − 2.9 mm | − 10.0 mm [− 11.6 to − 8.8] | 4.3 mm [3.1 to 5.9] | 0.67 [0.49 to 0.80] | ||