Table 2.
The protein concentrations in transabdominal amniotic fluid and those in transcervical amniotic fluid
| Alpha fetoprotein (IU/mL) | β-hCG (mIU/mL) | Prolactin (ng/mL) | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| Concentrations [mean (SD)] |
Transabdominal AF |
Transcervical AF | Transabdominal AF |
Transcervical AF | Transabdominal AF |
Transcervical AF |
|
|
||||||
| 2006 (1771) | 1997 (1575) | 1190 (1122) | 1322 (1220) | 784 (380) | 829 (592) | |
|
| ||||||
| Wilcoxon signed rank test (p value) | 0.93 | 0.82 | 1.00 | |||
|
| ||||||
| Spearman correlation coefficients (p value) | 0.94 (p<0.001) | 0.96 (p<0.001) | 0.72 (p<0.05) | |||
|
| ||||||
| Passing-Bablok regression analysis | ||||||
| Intercept [95% CI] | 176.9 [−415.2 to 629.9] | 75.6 [−989.7 to 260.7] | −48.5 [−989.9 to 372.7] | |||
| Slope [95% CI] | 0.86 [0.62 to 1.46] | 0.89 [0.67 to 2.50] | 1.05 [0.39 to 2.26] | |||
SD: standard deviation; AF: amniotic fluid
AFP: alpha fetoprotein, β hCG: human Chorionic Gonadotropin