6 Key Questions
James Phelps, MD, Bipolar Disorder Section Editor for Psychiatric Times, provided the questions for this interview.
Dr. Ketter is Professor in the Department of Psychiatry and Behavioral Sciences and founder and Chief of the Bipolar Disorder Clinic at the Stanford University School of Medicine, Stanford, CA.
1: Do you think the DSM-5 changes have made detection of bipolar disorder in depressed patients easier, harder, or some of each?
A: DSM-5 changes, which include the addition of mixed depression (major depressive episode with mixed features), have made detection of bipolar disorder in depressed patients more complex—although this better reflects the very substantial challenge of diagnosing bipolar disorder in depressed patients.
2: Dr. David Kupfer, chair of the DSM-5, stated in a 2013 article with Dr. Mary Phillips that unipolar and bipolar depression “might be better represented as an affective disorders continuum, with variable expressions of bipolarity representing dimensions of underlying pathophysiologic processes.”1 Do you agree with that?
A: I agree with the continuum/spectrum approach to mood disorders. This approach permits mixed depression (major depressive episode with mixed features) to occur in both bipolar disorder and unipolar major depressive disorder. It also allows more nuanced diagnostic determinations, and addresses questions such as “What is the probability that this current mood problem with prominent depression will ultimately be determined to be bipolar disorder rather than unipolar major depressive disorder?” rather than “Is this bipolar disorder or unipolar major depressive disorder?”
3: Regeer and colleagues2 from the Netherlands reported that only 22% of patients with bipolar disorder recognized their episodes of hypomania (vs 82% who recognized a depressive episode). Do you think most practitioners are aware of this problem? How are most of them making a diagnosis of bipolar disorder in patients who present with depression?
A: I agree that retrospective detection of at least one prior episode of hypomania in a currently depressed patient is very challenging. The reasons for this are multiple and complex; they likely include that prior hypomania by definition lacks severe adverse consequences (or commonly lacks even any functional impairment) and often is not detected or treated at the time. Another issue is state-dependent memory—the inability of currently depressed individuals to recall prior experiences that occurred when not depressed.
4: On markers of bipolarity that do not appear in the DSM criteria (eg, family history, age of onset, and “problematic outcomes” with antidepressants) that indicate increased probability of bipolar disorder in a patient presenting with depression: do you think we’re ready to expect gathering and reporting of those data from providers who are treating such a patient (ie, is it time to make that “standard of care”)?
A: In my view, there is sufficient evidence regarding non-DSM factors (eg, family history of bipolar disorder; first depression before age 25 years; history of psychosis; hypersomnia, hyperphagia, anergic depression; and worsening with antidepressants) that increase the likelihood of a bipolar outcome to invoke these clinically. Thus, treatment of depressed patients with more than one such factor merits particular caution regarding the possibility of a bipolar spectrum problem.
Dr Ketter is Professor in the Department of Psychiatry and Behavioral Sciences and founder and Chief of the Bipolar Disorder Clinic at the Stanford University School of Medicine, Stanford, California. His research has involved the etiology, phenomenology, and treatment of bipolar disorder. Etiologic research has used neuroimaging methods to better understand neurobiology and to explore the possibility of such techniques helping to more effectively target treatments. Phenomenologic research has focused on development and course of bipolar disorder in late adolescence/young adulthood, and links between creativity, temperament, and mood disorders. Treatment research has involved clinical trials of novel medications for bipolar disorder, with emphasis on anticonvulsants, second-generation antipsychotics, and comparative effectiveness of pharmacotherapies.
Dr Ketter has participated in numerous federally, foundation-, and industry-funded bipolar disorder clinical research studies, has received 2 National Alliance for Research in Schizophrenia and Depression Established Investigator Awards and Stanley Foundation Research Award Program support, and is an American Psychiatric Association Distinguished Fellow. He has published extensively on bipolar disorder, including over 400 scientific articles and book chapters, and is the editor of the American Psychiatric Publishing volumes Handbook of Diagnosis and Treatment of Bipolar Disorder and Advances in Treatment of Bipolar Disorders. He has served as Clinical Field Editor of CNS Spectrums and continues to serve on editorial boards for numerous journals including Bipolar Disorders, Journal of Affective Disorders, Journal of Psychiatric Research, and the International Journal of Bipolar Disorders.
The author has served as reviewer and chair for the Veterans’ Administration Merit Review Committee and as an ad hoc reviewer for the National Institute of Mental Health, the Medical Research Council of Canada, and the Canadian Psychiatric Research Foundation. He has had extensive experience in teaching and mentoring trainees, for which he has received the Irma Bland Certificate of Excellence in Teaching Residents from the American Psychiatric Association. Dr Ketter continues to care for patients with bipolar disorder, for which he has been awarded the Outstanding Faculty Physician Award by Vaden Health Center at Stanford University.
He reports that he has received grant/research support from Merck & Co., Inc., and Sunovion Pharmaceuticals; is a consultant/advisor to Acadia Pharmaceuticals, Allergan Pharmaceuticals, and Sunovion Pharmaceuticals; and has received honoraria from GlaxoSmithKline and Sunovion Pharmaceuticals and royalties from American Psychiatric Publishing, Inc. His spouse is an employee of and owns stock in Janssen Pharmaceuticals.
1. Phillips ML, Kupfer DJ. Bipolar disorder diagnosis: challenges and future directions. Lancet. 2013;381:1663-1671.
2. Regeer EJ, Kupka RW, Have MT, et al. Low self-recognition and awareness of past hypomanic and manic episodes in the general population. Int J Bipolar Disord. 2015;3:22.
3. Amsterdam JD, Lorenzo-Luaces L, Soeller I, et al. Safety and effectiveness of continuation antidepressant versus mood stabilizer monotherapy for relapse-prevention of bipolar II depression: a randomized, double-blind, parallel-group, prospective study. J Affect Disord. 2015;185:31-37.
4. Parikh SV, Zaretsky A, Beaulieu S, et al. A randomized controlled trial of psychoeducation or cognitive-behavioral therapy in bipolar disorder: a Canadian Network for Mood and Anxiety treatments (CANMAT) study [CME]. J Clin Psychiatry. 2012;73:803-810.