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Definition of Cross-sectional study

Cross-sectional study: A research study done at one time, not over the course of time. A cross-sectional study might be a study of a disease such as AIDS at one point in time, to learn its prevalence and distribution within the population. Also known as a synchronic study.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=2874
Last Editorial Review: 3/19/2012

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