National Guideline Clearinghouse™ (NGC) – Sponsored by the Agency for Health Care Policy and Research in partnership with the American Medical Association and the American Association of Health Plans.
Carney S, Doll H. Introduction to biostatistics: Part 2. Measures of association as used to address therapy, harm, and etiology questions. ACP J Club 2005 Sep-Oct; 143 (2): A8 – A9.
Doll H, Carney S. Introduction to biostatistics: Part 3. Statistical approaches to uncertainty: P values and confidence intervals unpacked. ACP J Club 2006 May-Jun; 144 (3): A8 – A9.
Study Design
CEBM Study Design - Overview of the study design tree, also from the CEBM in Oxford