Investigators assessed more than 800 patients with major depressive disorder (MDD) attending a partial hospital program. The patients completed questionnaires about depressive symptoms as well as functioning and broader measures of quality of life (QoL).
Brown University
Dr. Mark Zimmerman
Although fewer than 40% were classified as treatment responders on the basis of depressive symptoms, as measured by the Remission from Depression Questionnaire (RDQ), two-thirds met criteria as responders on the Patient Global Rating of Improvement (PGI) scale, which takes into consideration broader domains of life satisfaction.
“The treatments we’re offering patients may be doing a better job than we think in treating depression, because many patients say they feel significantly better, even if their depression symptoms haven’t been diminished by the arbitrary threshold of 50% or greater improvement,” study investigator Mark Zimmerman, MD, professor of psychiatry and human behavior, Brown University, Providence, R.I., told this news organization.
“Many of these patients – even if they have ongoing depressive symptoms – nevertheless say treatment has been very or extremely helpful, which is picked by other emphasizes in outcome, such as functioning, quality of life, coping abilities, and positive mental health,” added Dr. Zimmerman, director of the outpatient division at the Partial Hospital Program, Rhode Island Hospital.
The study was published online in the Annals of Clinical Psychiatry.
What’s the best tool?
“Almost all studies of depression treatment rely on measures of symptom severity to evaluate outcome – which is understandable, because a diagnosis of MDD requires a minimum number of symptoms for a sustained period of time,” said Dr. Zimmerman.
However, while important, symptom reduction is only one component of depression treatment. Improving overall function, QoL, and ability to deal with life’s stressors are equally important, he said.
Dr. Zimmerman emphasized he’s an “advocate, supporter, and practitioner of measurement-based care.” This approach, he said, “increases efficiency of the visit and directs me to the areas I should be inquiring about and the areas that need less time for inquiry.”
Measurement tools also enable numerical documentation of how a patient is doing and helps them understand and recognize their improvement.
The question is which tool captures improvements most effectively. Several surveys show that patients value improved functioning and QoL as primary treatment goals, which “is different from the emphasis of symptom improvement found in research,” said Dr. Zimmerman.
A multidimensional questionnaire that assesses functioning, QoL, and coping ability as well as symptoms is more likely to reflect patients’ treatment goals than simply measuring symptoms, he said.
Dr. Zimmerman and his coauthor reported on findings from the Rhode Island Methods to Improve Diagnostic Assessment and Services (MIDAS) Project, which “examined the concordance between patients’ global rating of improvement from treatment and responder status, based on a depression symptoms severity scale.”
Doing better than we think
The study was conducted in Rhode Island Hospital’s department of psychiatry partial hospital program, where 844 patients with MDD (65.2% women; mean [SD] age, 36.8 [13.9] years) completed the RDQ – a self-report measure that “assesses constructs that patients consider to be relevant for assessing treatment outcome.” This questionnaire assesses symptom and nonsymptom domains that people consider important when evaluating treatment effectiveness.