| CFI value range | Public health significance |
| 0.0-0.4 | Negative |
| 0.4-0.6 | Borderline |
| 0.6-1.0 | Slight |
| 1.0-2.0 | Medium |
| 2.0-3.0 | Marked |
| 3.0-4.0 | Very marked |
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.