Retrospective Cross Sectional Study

A cohort of individuals that share a common exposure factor is compared with another group of equivalent individuals not exposed to that factor to determine the factor s influence on the incidence of a condition such as disease or death.

Retrospective cross sectional study. In medical research social science and biology a cross sectional study also known as a cross sectional analysis transverse study prevalence study is a type of observational study that analyzes data from a population or a representative subset at a specific point in time that is cross sectional data. Retrospective study an epidemiologic study in which participating individuals are classified as either having some outcome cases or lacking it controls. With this design an investigator samples a source population cross sectionally and then retrospectively assesses subjects histories of exposures and outcomes over a specified time period.

Prospective studies retrospective studies cross sectional studies summary. Prospective studies retrospective studies. The outcome may be a specific disease and the persons histories are examined for specific factors that might be associated with that outcome.

In economics cross sectional studies typically involve the use of cross sectional regression in order to sort out the existence and magnitude of causal effects of one independent. One reason that 2 tests are so popular is that they can be used to analyze a wide variety of study designs in addition to controlled experiments they are widely used in epidemiology where investigators must conduct observational studies broadly speaking observational studies in epidemiology fall into three categories. A retrospective cohort study also called a historic cohort study is a longitudinal cohort study used in medical and psychological research.

A retrospective cross sectional study of risk factors and clinical spectrum of children admitted to hospital with pandemic h1n1 influenza as compared to influenza a shaun k morris 1 patricia parkin 2. Retrospective a retrospective study looks backwards and examines exposures to suspected risk or protection factors in relation to an outcome that is established at the start of the study. Retrospective cohort studies have existed for approximately as long as prospective cohort studies.

That s why researchers might start with a cross sectional study to first establish whether there are links or associations between certain variables. Cross sectional studies can be done more quickly than longitudinal studies. Cases and controls are often matched with respect to certain demographic or other variables but need not be.

Many valuable case control studies such as lane and claypon s 1926 investigation of risk factors for breast cancer were retrospective investigations. For a cross sectional study the exposure and outcome status are assessed at the same point in time. The cross sectional cohort study as it is termed here represents an alternative to these standard methods.