Table 2 |
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|
Inter-observer variability in the ultrasonographic measurements of the umbilical cord (n = 221) |
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| Characteristics |
Mean Difference (SD) |
95%CI |
p* |
R |
ICC |
Crombach's alpha |
|
|
||||||
| Diameter of the cord (mm) |
0.024 (1.208) |
(-0.136; 0.185) |
0.896 |
0.90 |
0.94 |
0.97 |
| Diameter of the artery (mm) |
-0.057 (0.677) |
(-0.147; 0.032) |
0.728 |
0.79 |
0.83 |
0.91 |
| Diameter of the vein (mm) |
0.045 (0.907) |
(-0.075; 0.166) |
0.800 |
0.90 |
0.91 |
0.95 |
| Area of the cord (mm2) |
1.088 (30.120) |
(-2.905; 5.081) |
0.903 |
0.90 |
0.92 |
0.96 |
|
|
||||||
|
* Mann-Whitney's non parametric test. R: Spearman's correlation coefficient (p < 0.0001). ICC: intraclass correlation coefficient (internal consistency). |
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|
Barbieri et al. Reproductive Health 2008 5:5 doi:10.1186/1742-4755-5-5 |
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