Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Assumptions for power calculation
| Outcome | Prevalence in screening group | Prevalence in COVID-19 group | Sample size screening group | Sample size COVID-19 group |
| Pre-eclampsia | 6% | 12% | 511 | 256 |
| Thrombosis | 0.13% | 2% | 613 | 306 |
| Small for gestational age (below 10th percentile) | 10% | 20% | 199 | 199 |
| Preterm delivery | 6% | 12% | 511 | 256 |
| Neurological and/or neurodevelopmental disorders | 1% | 4% | 581 | 290 |
