Table 2.
Geometric means of maternal human chorionic gonadotropin and free β-human chorionic gonadotropin concentrations by maternal characteristics at enrollment and child gender.
| Characteristics | n | hCG (mU/ml) | Free β-hCG (ng/ml) |
|---|---|---|---|
| Median age at blood draw | |||
| <26.6 | 141 | 96,552 | 792 |
| ≥26.6 | 145 | 98,135 | 813 |
| p-value | 0.72 | 0.85 | |
| Child's gender | |||
| Male | 155 | 91,524 | 708 |
| Female | 131 | 104,253 | 915 |
| p-value | 0.004 | 0.061 | |
| Smoking | |||
| No | 204 | 103,477 | 807 |
| Yes | 81 | 82,515 | 785 |
| p-value | <0.0001 | 0.86 | |
| Parity at diagnosis | |||
| 1 | 56 | 94,219 | 911 |
| ≥2 | 230 | 98,118 | 777 |
| p-value | 0.49 | 0.33 | |
hCG: Human chorionic gonadotropin