Design of artificial neural network and its applications to the analysis of alcoholism data |
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Authors: | Li W Haghighi F Falk C T |
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Affiliation: | Laboratory of Statistical Genetics, Rockefeller University, New York, NY 10021, USA. |
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Abstract: | Artificial neural networks were applied to the alcoholism data to reveal nonlinear relationships between intermediate phenotypes, marker identity-by-descent sharing, and the affection status. A variable number of hidden units were considered to achieve a balance between the minimal mean-squared error and over-fitting of the data. The predictability of the affection status based on intermediate phenotype information (event-related potential 300, monoamine oxidase, and gender) was 65% to 75%, and sensitivity/specificity ranged around 50% to 80%. The IBD approach succeeded in identifying the same marker as previous studies, but also found additional peaks. |
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