FIGURE 3. RR of PTB according to treatment and race.
Unadjusted relative risk (RR) of preterm birth (<37 weeks) for progesterone vs placebo for black race (open triangle) and other race (open inverted triangle).
CI, confidence interval.
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.