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June 2010

In Reply

Author Affiliations

Author Affiliations: Department of Psychiatry, University of Michigan, Ann Arbor (Dr Sen); Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut (Drs Sen, Krystal, Speller, Gelernter, and Guille); Departments of Psychiatry and Genetics and Developmental Biology, University of Connecticut School of Medicine, Farmington (Drs Kranzler and Chan); and Department of Psychiatry, Medical University of South Carolina, Charleston (Dr Guille).


Copyright 2010 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2010

Arch Gen Psychiatry. 2010;67(6):568-569. doi:10.1001/archgenpsychiatry.2010.53

In his Commentary, Dr Kendler makes a series of thoughtful points about our article and the state of the science in the analysis of gene × environment effects. He suggests that our analysis would be enhanced by a more comprehensive assessment of interns' work conditions at baseline and an exploration of factors that could predict differential trajectories of depression during internship. We appreciate these suggestions and plan to incorporate them in analyses of this growing data set that includes additional time points conducive to growth modeling. Dr Kendler also called attention to the fact that we found an association between depression and long work hours, which differs from prior reports. Although, as he points out, varying perceptions of working conditions may play a role in this difference, our sample was substantially larger than those in previous studies. Consequently, insufficient statistical power may explain the failure of previous studies to identify work hours as a correlate of depression.

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