Table 3.
Accuracy rate of new formula and other previous guidelines for placing the central venous catheter in the optimal zone, which was defined between 3 cm above the superior edge of the crista terminalis and 1 cm above it.
| Guidelines | Equation (cm) | Accuracy rate (95% CI) |
OR (95% CI) | P-value |
|---|---|---|---|---|
| New formula* | H/10 - 1.5 | 71.9% (62.4-81.4) | ||
| Peres 7 | H/10 | 34.8% (24.7-44.9) | 4.79 (2.53, 9.09) | < 0.001 |
| Czepizak et al. 8 | H/10 - 1 | 58.4% (48.0-68.9) | 1.82 (1.25, 2.66) | 0.002 |
| Lum 9 | H/10 - 1.3 | 67.4% (57.5-77.3) | 1.24 (0.92, 1.66) | 0.153 |
| Kim et al. 10 | 15 | 50.6% (40.0-61.2) | 2.50 (1.45, 4.32) | 0.001 |
| The carina 11 | to the carina on the CXR | 36.0% (25.8-46.1) | 4.56 (2.38, 8.73) | < 0.001 |
CI; confidence interval, OR; odds ratio when the new formula*, which was suggested from our results, was compared with the others as reference, H; patient's height (cm), CXR; chest X-ray after the surgeries, P-value was presented as the Bonferroni corrected P-value after generalized estimating equations (GEE) analysis.