Epidemiological research methods. Part III. Randomised controlled trials (for interventions)
Botha, J. L. ; Yach, D. (1987)
CITATION: Botha, J. L. & Yach, D. 1987. Epidemiological research methods. Part III. Randomised controlled trials (for interventions). South African Medical Journal, 71:657-660.
The original publication is available at http://www.samj.org.za
Article
Once the magnitude and distribution of a health problem and its possible determinants have been established, anempts to prevent, treat, or control the problem by intervening on one or more of the determinants should be made.