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.
Study codes and designs
| Study types | Designs |
|---|---|
| Trials | RCTs and cohort studies |
| Implementation, feasibility and demonstration projects | |
| Observational studies | Epidemiological studies |
| Cross-sectional studies (qualitative, quantitative and mixed methods) | |
| Diagnostic accuracy studies | |
| Modelling | Economic evaluation |
| Epidemiological modelling | |
| Systematic reviews | Meta-analyses, meta-syntheses and meta-ethnography |
