CommentaryStatistics Commentary Series. Commentary No. 38: Simpson's Paradox and the Mantel-Haenszel χ2Streiner, David L. PhD, CPsychAuthor Information From the Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton; and Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada. Reprints: David L. Streiner, PhD, CPsych, St Joseph's Healthcare, Mountain Campus, 100 W 5th St, Hamilton, Ontario, Canada L8N 3K7 (e-mail: firstname.lastname@example.org). Journal of Clinical Psychopharmacology: 3/4 2020 - Volume 40 - Issue 2 - p 109-111 doi: 10.1097/JCP.0000000000001184 Buy Metrics Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.