Cross-sectional Study
Cross-sectional studies (also known as cross-sectional analyses, transversal studies, prevalence study) form a class of research methods that involve observation of all of a population, or a representative subset, at one specific point in time. They differ from case-control studies in that they aim to provide data on the entire population under study, whereas case-control studies typically include only individuals with a specific characteristic, with a sample, often a tiny minority, of the rest of the population. Cross-sectional studies are descriptive studies (neither longitudinal nor experimental). Unlike case-control studies, they can be used to describe, not only the Odds ratio, but also absolute risks and relative risks from prevalences (sometimes called prevalence risk ratio, or PRR). They may be used to describe some feature of the population, such as prevalence of an illness, or they may support inferences of cause and effect. Longitudinal studies differ from both in making a series of observations more than once on members of the study population over a period of time.
Read more about Cross-sectional Study: Cross-sectional Studies in Medicine
Famous quotes containing the word study:
“If we study nature attentively, alike in its great revolutions and in its minutest works, it is impossible not to admit enchantmentgiving the word its fullest meaning. Man can create no force; he can but use the only existing force, which includes all others, namely, Motionthe incomprehensible Breath of the sovereign maker of the universe.”
—HonorĂ© De Balzac (17991850)