The article you requested is
Predicting Suicide Attempt Risk: Logistic Regression Requires Large Sample Sizes
J Clin Psychiatry 2011;72(12):1698 [letter]
Copyright 2011 Physicians Postgraduate Press, Inc.
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Letter to the Editor
Because this piece does not have an abstract, we have provided for your benefit the first 3 sentences of the full text.
Dr Gilbert and colleagues make an important point about the difficulties in predicting suicide, but their conclusions do not follow as strongly from their data as they suppose. They report negative findings based on logistic regressions using clinical, demographic, and cognitive predictor variables. However, their data set is relatively small, with 28 events (suicide attempts) in 67 subjects; their regressions use 12 clinical and demographic predictors and, separately, 7 cognitive and demographic predictors.