Figure 1. Recruitment, Randomization, and Participant Flow in a Trial of Hydrocortisone vs Placebo Among Very Preterm Infants Receiving Mechanical Ventilation.
aRespiratory index was defined as mean airway pressure × fraction of inspired oxygen.
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.