Major Depressive Disorder

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The prevalence of depression in children and adolescents ranges from 2% to 8% in the general population, which indicates that depression in this population is a major public health concern.1-3 This is especially apparent when rates of depression are compared with other serious medical conditions in childhood, such as diabetes, which has a prevalence of 0.18%.4 The burden of depressive illness-including significant functional impairment in interpersonal relationships, school, and work-on the developing child has been well documented. Affected youths are frequently involved in the juvenile justice system.5-8 Furthermore, adolescents with depression are at increased risk for substance abuse, recurrent depression in adulthood, and attempted or completed suicide.3,9-15

Since the time of Homer, warriors have returned from battle with wounds both physical and psychological, and healers from priests to physicians have tried to relieve the pain of injured bodies and tormented minds.1 The soldier’s heartache of the American Civil War and the shell shock of World War I both describe the human toll of combat that since Vietnam has been clinically recognized as posttraumatic stress disorder (PTSD).2 The veterans of Operation Iraqi Freedom (OIF) and of Operation Enduring Freedom (OEF) share with their brothers and sisters in arms the high cost of war. As of August 2009, there have been 4333 confirmed deaths of US service men and women and 31,156 wounded in Iraq. As of this writing, 796 US soldiers have died in the fighting in Afghanistan.3

In our last installment, we discussed a familiar finding from the National Comorbidity Survey Replication (NCS-R): the peak age of onset for any mental health disorder is about 14 years. In an attempt to explain these data, we are exploring some of the known developmental changes in the teenaged brain at the level of gene, cell, and behavior.

Self-administration of drugs of abuse often causes changes in the brain that potentiate the development or intensification of addiction. However, an addictive disorder does not develop in every person who uses alcohol or abuses an illicit drug. Whether exposure to a substance of abuse leads to addiction depends on the antecedent properties of the brain.

>I greatly enjoyed Dr Ron Pies’ editorial “What Should Count as a Mental Disorder in DSM-V?”1 in which he encouraged framers of DSM-V to critically examine the boundaries of mental illness and to more carefully distinguish between diseases, disorders, and syndromes. As I have noted elsewhere, current plans to integrate a “spectrum” approach into DSM-V require a careful consideration of these issues that must be defensible to critics of diagnostic expansion within psychiatry.2

There is currently a small but impressive evidence base that shows that psychological and interpersonal factors play a pivotal role in pharmacological treatment responsiveness.

Currently the Veterans Administration (VA) is the world’s largest recipient of per patient funding for PTSD. The VA treats 200,000 veterans with this diagnosis annually at a cost of $4 billion. But research calls into question the very existence of the “PTSD” syndrome, and its diagnostic formulation remains invalid. We do not minimize the suffering of those who experience trauma or the need for comfort and restitution. We seek only to reexamine research evidence, to clarify the impact of culture on diagnosis, to reevaluate the consequences of trauma, and to ensure optimal allocation of resources.

Transcranial magnetic stimulation produced improvements in key areas of cognition and in short-term verbal memory in patients with major depressive disorder, and no adverse cognitive effects were shown. The results of this research were presented by Mark Demitrack, MD, vice president and chief medical officer of Neuronetics, Inc, and colleagues at the annual meeting of the American Psychiatric Association in May.

Patients who have had a myo­cardial infarction (MI) should be screened and appropriately treated for depression, according to a guideline recently issued by the American Academy of Family Physicians (AAFP).1 The group recommends use of a standardized depression symptom checklist during hospitalization and “at regular intervals” thereafter.

Cardiovascular disease kills more people worldwide than everything else combined, said Dean Ornish, MD, cardiologist and clinical professor of medicine at the University of California in San Francisco. Dr Ornish is well known for his lifestyle-driven approach to the control of cardiovascular disease. Depending on the extent of personalized lifestyle changes, disease progression can be stopped and even reversed.