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.
Cohort demographics after matching.
| Cohort 1a | Cohort 2a | Cohort 1b | Cohort 2b | |
|---|---|---|---|---|
| Mean Age (S.D.) | 4.45 (4.06) | 4.39 (3.99) | 4.46 (4.08) | 4.46 (4.13) |
| Male | 53.9% | 59.2% | 53% | 58.4% |
| Female | 46.1% | 40.8% | 47% | 41.6% |
| White | 50% | 51.3% | 49.7% | 45% |
| Black or African American | 28.9% | 21% | 28.9% | 23.5% |
| Not Hispanic or Latino | 61.1% | 62.5% | 61.1% | 49% |
| Hispanic or Latino | 18.4% | 13.8% | 18.1% | 12.1% |
| Unknown Ethnicity | 20.4% | 23.7% | 20.8% | 38.9% |
