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ISSN 0187-5337 (Print)
Instituto Nacional de Perinatología

2009, Number 1

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Perinatol Reprod Hum 2009; 23 (1)

Estudios de cohorte

Martínez JA

Language: Spanish
References: 10
Page: 18-24
PDF size: 126.68 Kb.


ABSTRACT

Among observational studies, those with the best strength are cohort studies. These include different strategies witch evaluate a group of subjects in several occasions through a established period of time chosen by theresearcher and specified by the prevalence as well as the natural history of the disease. Even when their results can be shadowed by the influence of both confusing parameters and different kind of bias, they represent a strategy of great relevance in finding about the factors involved in the causal chain of medical problems. This article is meant to be an introductory brush up to know the main characteristics of cohort studies and to provide a quick and brief reference of the main sources of bias in the medical application of these kinds of studies.


REFERENCES

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