Minor depression is a common disorder that may impair a person's functioning and quality of life and is a serious risk factor for major depression. Yet it is underdiagnosed and undertreated. The study addresses a need for definitive data on therapy for this significant health problem. Patients with minor depression who seek treatment from family doctors are often treated with prescription antidepressants, if their mood disorder is diagnosed at all. Many people use St. John's wort without consulting a physician. This study will help determine how the herbal agent and the antidepressant fit in the overall management of the disorder.
"There is high public interest in herbal remedies for depression," according to Stephen E. Straus, M.D., NCCAM Director. "Our intent is to study St. John's wort for the spectrum of depressive conditions for which the public considers its use. This new study extends our earlier research efforts from the more serious form of depression to a clinically less serious one, yet one that is, in fact, of considerable public health significance," he said.
Men and women age 18 to 85 who meet diagnostic criteria for minor depression are eligible to participate. They must have experienced depressive symptoms for at least 6 months but less than 2 years continuously without meeting criteria for a major depressive episode or dysthymia within the past year. Additional exclusionary criteria include other mental disorders, such as schizophrenia, bipolar disorder, anxiety and substance use disorders. Individuals with some active physical illnesses, such as cardiovascular, renal, respiratory, endocrine, neurological, or blood diseases also are not eligible for the study.
Participants are interviewed at an initial screening visit, during the initial two-week period when they are withdrawn from all psychotropic medications, at baseline, and every two weeks thereafter during the study. At the screening visit, Week 12, and Week 20, patients will undergo a complete blood count with laboratory tests. Well validated scales will be used to assess symptoms, dysfunction, and well-being.
Minor depression affects about 7.5 percent of Americans during their lifetime. Although there is broad knowledge about the scope of suffering and disability due to major depressive disorder, less is known about the day-to-day struggles faced by people with minor depression. Its symptoms are the same as those of major depression, though fewer in number and causing less impairment. They include:
- Either a depressed mood most of the day, nearly every day
- Or a markedly diminished interest or pleasure in daily activities
- Plus two to four of the following symptoms:
Significant weight loss or gain, or decrease or increase in appetite
Disturbance in sleep pattern
Noticeable agitation or slowness
Fatigue or loss of energy
Inappropriate feelings of worthlessness or guilt
Diminished ability to concentrate, indecisiveness
Recurrent thoughts of death or suicide
- Symptoms must last at least 6 months but less than 2 years continuously.
Trials are being conducted in:
Boston, Massachusetts, at Massachusetts General Hospital. Andrew A. Nierenberg, M.D., is the principal investigator. The coordinator is Megan Hughes at 617-726-3129; mhughes3@partners.org.
Los Angeles, California, at Cedars-Sinai Medical Center. Mark Rapaport, M.D., is the principal investigator. The coordinator is Rachel E. Maddux at 310-423-4473; madduxr@cshs.org .
Pittsburgh, Pennsylvania, at the University of Pittsburgh. Robert Howland, M.D., is the principal investigator. The coordinator is Michael Lightfoot at 412-624-5035; lightfootm@msx.upmc.edu.
