# Clinical Research
Clinical study design, statistical analysis, and regulatory compliance for medical research.
| Design | Level of Evidence | Best For |
|---|---|---|
| RCT | I | Treatment efficacy |
| Cohort (prospective) | II | Risk factors, prognosis |
| Cohort (retrospective) | III | Exposure-outcome associations |
| Case-control | III | Rare diseases, risk factors |
| Cross-sectional | IV | Prevalence, correlations |
| Case report/series | V | Novel observations |
pwr package, Python statsmodels| Guideline | Study Type |
|---|---|
| CONSORT | Randomized controlled trials |
| STROBE | Observational studies |
| PRISMA | Systematic reviews / meta-analyses |
| STARD | Diagnostic accuracy |
| TRIPOD | Prediction models |
| SPIRIT | Study protocols |