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.
Distribution of types of studies cited by cannabis-prescribing clinics (n=235).
| Type of study | Studies, n (%) |
| Review | 53 (22.6) |
| Survey | 40 (17.0) |
| Basic science study | 29 (12.3) |
| Observational cohort study (prospective and retrospective) | 27 (11.5) |
| Randomized controlled trial | 24 (10.2) |
| Systematic review/meta-analysis | 19 (18.1) |
| Clinical trial (“noncontrolled” or nonrandomized) | 17 (7.2) |
| Cross-sectional study | 10 (4.3) |
| Case series/report | 8 (3.4) |
| Expert opinion | 6 (2.6) |
| Qualitative study | 2 (0.9) |
