Table 3 |
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|
Intra-observer variability in the ultrasonographic measurements of the umbilical cord (n = 221) |
||||||
| Characteristics |
Mean Difference (SD) |
(95%CI) |
p* |
R |
ICC |
Crombach's alpha |
|
|
||||||
| Diameter of the cord (mm) |
-0.120 (0.960) |
(-0.248; 0.007) |
0.734 |
0.95 |
0.96 |
0.98 |
| Diameter of the artery (mm) |
-0.137 (0.576) |
(-0.213; -0.06) |
0.332 |
0.86 |
0.88 |
0.94 |
| Diameter of the vein (mm) |
0.011 (0.763) |
(-0.09; 0.113) |
0.917 |
0.92 |
0.94 |
0.97 |
| Area of the cord (mm2) |
-2.500 (24.390) |
(-5.74; 0.73) |
0.732 |
0.95 |
0.95 |
0.97 |
|
* Mann-Whitney's non parametric test. R: Spearman's correlation coefficient (p < 0.0001). ICC: intraclass correlation coefficient (internal consistency) | ||||||
Barbieri et al. Reproductive Health 2008 5:5 doi:10.1186/1742-4755-5-5 |
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