Causal analysis in the genetic study of neuropsychiatric disorders: Narrative review
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Abstract
Neuropsychiatric disorders are characterized by complex forms of genetic transmission. Knowledge of the basic aspects of the most commonly used methodological designs used in research on the genetics of these disorders allows the clinician to perform a more effective search of the literature available as well as a better critical reading and practical application of the articles in this field of knowledge. The objectives of this review are to describe the statistical-epidemiological designs that are most commonly used in this field and to illustrate this description with several examples. Specifically, we review the general methodological aspects of twin studies, adoption studies, pedigree analysis, association studies (case-control), and genetic linkage analysis.
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