Hong Kong Dermatology & Venereology Bulletin

Volume 10 Number 3, September 2002

Common Approaches in Medical Research

Dr. T. S. Au
Social Hygiene Service, Department of Health, Hong Kong

The cohort study, case-control study and randomized control trial are commonly used in medical research. Each type has its own strength and weakness. All doctors, no matter whether they are actively involved in research or not, should be familiar with these study designs. Understanding the principles can help them to be more critical when reading medical journals.

Keywords : Case-control study, cohort, randomized control trial

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