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New page: A longitudinal study observes the same subjects, usually human beings, over a long period of time, usually to detect onset of disease. A longitudinal study differs in approach from a [[cr...
A longitudinal study observes the same subjects, usually human beings, over a long period of time, usually to detect onset of disease.
A longitudinal study differs in approach from a [[cross-sectional study]] and a [[retrospective study]].
A longitudinal study differs in approach from a [[cross-sectional study]] and a [[retrospective study]].