Reply to Predicting Suicide Attempt Risk: Logistic Regression Requires Large Sample Sizes
J Clin Psychiatry 2011;72(12):1698 [letter]
© Copyright 2015 Physicians Postgraduate Press, Inc.
Purchase This PDF for $40.00
If you are not a paid subscriber, you may purchase the PDF.
(You'll need the free Adobe Acrobat Reader.)
Receive immediate full-text access to JCP. You can subscribe to JCP online-only ($86) or print + online ($156 individual).
With your subscription, receive a free PDF collection of the NCDEU Festschrift articles. Hurry! This offer ends December 31, 2011.
If you are a paid subscriber to JCP and do not yet have a username and password, activate your subscription now.
As a paid subscriber who has activated your subscription, you have access to the HTML and PDF versions of this item.
Click here to login.
Did you forget your password?
Still can't log in? Contact the Circulation Department at 1-800-489-1001 x4 or send email
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.
We thank Dr Bagley for his comments on our article. We agree that a larger sample size would have been optimal; however, given that the predictors included in the models were not altogether independent of one another (eg, the cognitive measures have substantial intercorrelations), the number of truly independent factors tested was—to some degree—reduced. Nonetheless, as we acknowledged in the article, there is always a possibility that a study with negative findings is underpowered to detect a true effect.