intervention study

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intervention study (inter-ven-shŏn) n. a comparison of the outcome between two or more groups of patients that are deliberately subjected to different regimes to test a hypothesis (usually of treatment but sometimes of a preventive measure, such as vaccination). See blind trial, controlled trial, cross-over trial, double-blind trial.

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intervention study Comparison of an outcome (e.g. morbidity or mortality) between two groups of people deliberately subjected to different dietary or drug regimes.

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