Health care reform involves critically looking at health care practices and deciding if the evidence supports a continuation of routine practices, including screening for potential illness.
New Canadian research recommends that primary care physicians should not perform routine screening for depression among adults who present with no apparent symptoms of depression.
Guidelines in other countries differ slightly from the Canadian guidelines. The U.S. Preventive Services Task Force recommends universal screening where supports exist to ensure follow-up treatment.
In the United Kingdom, the National Institutes for Health and Clinical Excellence recommends a targeted approach, focusing on people with a history of depression rather than general screening.
Investigators say a lack of high-quality evidence on the benefits and harms of screening for depression influenced the decision by the Canadian Task Force on Preventive Health Care (CTFPHC).
The recommendation is published in the Canadian Medical Association Journal.
These guidelines mark a change in approach from the task force’s 2005 guidelines, which recommended screening adults in primary care settings where there were integrated staff-assisted systems to manage treatment.
“In the absence of a demonstrated benefit of screening, and in consideration of the potential harms, we recommend not routinely screening for depression in primary care settings, either in adults at average risk or in those with characteristics that may increase their risk of depression,” writes Dr. Michael Joffres.
The recommendations do not apply to people with known depression, with a history of depression or who are receiving treatment for depression.
However, clinicians should be alert to the possibility of depression, especially in patients with characteristics that may increase their risk of depression, and should look for it when there are clinical clues, such as insomnia, low mood, anhedonia (inability to experience pleasure) and suicidal thoughts.
These recommendations do not apply to people with known depression, with a history of depression or who are receiving treatment for depression.
“These recommendations do not apply to people with known depression, with a history of depression or who are receiving treatment for depression.
“Patients who present with symptoms or other clues to the presence of depression should be appropriately assessed for depression,” explained Dr. Gabriela Lewin.
The task force calls for high-quality randomized controlled trials with an unscreened control group to understand the effect of screening, the potential harms of screening, such as false-positive diagnoses with subsequent unnecessary treatment, as well as the implications of earlier detection of depression through screening.
In a related commentary, Dr. Roger Bland, Department of Psychiatry, University of Alberta, writes, “There is no question, as the task force amply illustrates, that depression constitutes a major public health problem. Although milder cases may require only watchful waiting rather than treatment, about 15 percent of people with major depression go on to a chronic course, with much residual disability.
“Family physicians have been criticized for failing to recognize depression. However, studies have shown that many missed cases are those of milder depression, which often remits spontaneously, and that patients with milder forms of depression may experience adverse effects and other complications if the depression is treated.”