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.
| Efficacy |
||||||
| Study design | Technical | Diagnostic accuracy | Diagnostic thinking | Therapeutic | Not applicable | Total |
| Case report | 0 | 0 | 0 | 0 | 115 | 115 |
| Case series | 0 | 1 | 0 | 1 | 38 | 40 |
| Cross-sectional | 2 | 65 | 4 | 3 | 133 | 207 |
| Case–control | 0 | 3 | 0 | 0 | 8 | 11 |
| Cohort | 0 | 0 | 0 | 1 | 3 | 4 |
| Experimental | 1 | 5 | 0 | 0 | 1 | 7 |
| Other | 68 | 92 | 0 | 0 | 181 | 341 |
| Total | 71 | 166 | 4 | 5 | 479 | 725 |
