Canadian Medical Guide > Analytical, Diagnostic and Therapeutic Techniques and Equipment > Investigative Techniques > Epidemiologic Methods > Epidemiologic Study Characteristics Terms and Definitions

Epidemiologic Study Characteristics

Medical Definition:	Types and formulations of studies used in epidemiological and clinical research.
Guide Notes:	not used for indexing or cataloging
Previously Indexed:	Epidemiologic Methods (1966-1997),Epidemiology (1966-1997),Research (1966-1997)

Epidemiologic Study Characteristics Categories.

	Clinical Trials - Pre-planned studies of the safety, efficacy, or optimum dosage schedule (if appropriate) of one or more diagnostic, therapeutic, or prophylactic drugs, devices, or techniques selected according to predetermined criteria of eligibility and observed for predefined evidence of favorable and unfavorable effects. This concept includes clinical trials conducted both in the U.S. and in other countries.
	Epidemiologic Studies - Studies designed to examine associations, commonly, hypothesized causal relations. They are usually concerned with identifying or measuring the effects of risk factors or exposures. The common types of analytic study are CASE-CONTROL STUDIES; COHORT STUDIES; and CROSS-SECTIONAL STUDIES.
	Feasibility Studies - Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
	Intervention Studies - Epidemiologic investigations designed to test a hypothesized cause-effect relation by modifying the supposed causal factor(s) in the study population.
	Pilot Projects - Small-scale tests of methods and procedures to be used on a larger scale if the pilot study demonstrates that these methods and procedures can work.
	Sampling Studies - Studies in which a number of subjects are selected from all subjects in a defined population. Conclusions based on sample results may be attributed only to the population sampled.
	Twin Studies - Methods of detecting genetic etiology in human traits. The basic premise of twin studies is that monozygotic twins, being formed by the division of a single fertilized ovum, carry identical genes, while dizygotic twins, being formed by the fertilization of two ova by two different spermatozoa, are genetically no more similar than two siblings born after separate pregnancies. (Last, J.M., A Dictionary of Epidemiology, 2d ed)

Epidemiologic Study Characteristics Medical Definitions and Terms

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