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2012, Number 5

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Rev Med Inst Mex Seguro Soc 2012; 50 (5)

Clinical research XI. From the clinical judgment to the case and controls design

Talavera JO, Rivas-Ruiz R
Full text How to cite this article

Language: Spanish
References: 8
Page: 505-510
PDF size: 47.15 Kb.


Key words:

Case-control studies, clinical trial.

ABSTRACT

The case-control design like the historical cohort carries a number of potential biases as a consequence of the reconstruction of events once the outcome has occurred, and as a consequence of the bias generated by the selection of the control group. This design is characterized by a number of cases (cases), for which we identify a comparison group (controls). It begins at the outcome in direction to the probable cause; therefore, it requires reconstructing events in the opposite direction as it occurs in the phenomenon of causality. However, we must always keep in mind the architectural design, and consider in each section —baseline, maneuver and outcome— characteristics that allow us to demonstrate the effect of the maneuver, avoiding improper assembly, susceptibility, performance and detection bias. The transfer bias can only be controlled with the provision of a defined population, whether it is a population based case-control study or a case-control study nested in a cohort. When a defined population is not possible, this design is only recommended in rare diseases.


REFERENCES

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  3. Feinstein AR. Directionality and scientific inference. J Clin Epidemiol 1989;42:829-833.

  4. Rothman KJ, Greenland S, Lash TL. Modern epidemiology. Third edition. Baltimore: Williams & Wilkins; 2008.

  5. Portney LG, Watkins MP. Foundations of clinical research: applications to practice. Third edition. New Jersey: Pearson- Prentice Hall; 2009.

  6. Talavera JO, Wacher-Rodarte NH, Rivas-Ruiz R. Clinical research III. The causality studies. Rev Med Inst Mex Seguro Soc 2011;49(3):289-294.

  7. Talavera JO. Clinical research I. The importance of research design. Rev Med Inst Mex Seguro Soc 2011;49 (1):53-58.

  8. Cruz-Anguiano V, Talavera JO, Vázquez L, Antonio A, Castellanos A, Lezana MA, et al. The importance of quality of care in perinatal mortality: a case-control study in Chiapas, Mexico. Arch Med Res 2004;35(6):554-562.




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Rev Med Inst Mex Seguro Soc. 2012;50