Short-term cognitive therapy shows promise for dysthymia
Short-term cognitive therapy offers a potentially effective approach to treating the chronically depressed patient. While drug therapy—either alone or in tandem with psychotherapy—can help, some patients with dysthymia can adopt a cognitive approach to conquer a life-long problem in just 3 to 6 months.
Chronic depression has long been understood as a psychological constellation and a personality disorder. In the past, recommended treatment focused on long-term psychotherapy,1 although it was acknowledged that the “depressive personality” rarely responded well.2
Psychiatrists today commonly offer antidepressant drug trials to patients with dysthymia. Yet while tricyclic antidepressants have been shown to have some value in the treatment of chronically depressed patients,3 investigations of selective serotonin reuptake inhibitors in this population have produced inconsistent results.4
This article presents two case studies that illustrate how I use the cognitive approach to dysthymia in my psychiatric practice. Both patients were treated successfully with a short-term approach to therapy. While the final verdict on brief psychotherapy as an approach to dysthymia is not in, I believe there are reasons for optimism.
What is dysthymia?
Chronic depression (dysthymia) is thought to be a heterogeneous condition in which comorbid psychiatric and medical conditions frequently occur.5 According to DSM-IV diagnostic criteria (Table 1), dysthymia differs from major depression in the number of changes necessary for diagnosis (only two of six) and in the longer duration of symptoms (at least 2 years).
DSM-IV DIAGNOSTIC CRITERIA FOR DYSTHYMIA
*Adapted from: Diagnostic and Statistical Manual of Mental Disorders. 4th ed. Text revision. Washington, DC: American Psychiatric Association, 2000.
The lifetime prevalence of dysthymia is 6%. The chronically depressed face a 10% risk each year of developing major depression. Women are two to three times more likely to suffer dysthymia than men.6
Thase and Howland, in a classic 1995 article, described three clinical routes that lead to dysthymia:
- incompletely resolved major depression;
- chronic depressed mood with associated symptoms below the threshold for a diagnosis of major depression;
- dysthymia secondary to medical illness, medications, or substance abuse. 7
The clinical term dysthymia has its roots in three older constructs: neurotic depression, depressive personality, and chronic depression.8 Use of the term “neurotic depression” is now discouraged as it has numerous meanings, some of which are contradictory. “Chronic depression” also obscures more than it illuminates. The term “depressive personality” has survived, with a new set of criteria for diagnosis outlined in DSM-IV. Its separation from “dysthymia” is not clear.
Although the subsyndromic nature of dysthymia might suggest a condition milder than major depression, its lifetime comorbidity with a range of serious emotional problems (Table 2) suggests otherwise.
Cognitive therapy for dysthymia
Cognitive therapy targets depressive thinking as the major culprit in depression.9 Researchers have found that a brief course of psychotherapy is sometimes as effective as pharmacotherapy in treating major depression.10 While it may seem counterintuitive that a short-term approach would solve a long-term problem such as dysthymia, I have found that cognitive therapy can offer a cost-effective, life-sustaining contribution of lasting value.
There is an urgent need to educate primary care clinicians about the value of a brief psychotherapy approach to chronic depression. They are the first clinicians to see 75% of patients with depression. In the medical setting, patients with dysthymia most often present with physical complaints, such as fatigue and insomnia.11 When the internist or family physician does recognize dysthymia and treat it appropriately, pharmacologic approaches predominate.
Medical training guiding whom or which disorders to refer for psychotherapy is woefully lacking. Studies documenting the value of psychotherapy as a treatment for dysthymia are needed to broaden referring physicians’ options. While long-term, psychodynamic therapy for depression may sound obscure to the medical referrer, short-term cognitive therapy typically makes sense. Moreover, both consumers and managed care organizations are demanding quicker results from providers of mental health services.
LIFETIME COMORBIDITY ASSOCIATED WITH DYSTHYMIA
Any psychiatric disorder
*Adapted from: Markowitz JC. Co-morbidity of dysthymia. Psychiatr Ann 1993;23(11):617-24.
Cognitive therapy is most clearly distinguished from traditional psychodynamic psychotherapy by its focus on the present. While a cognitive therapist may believe that current thinking in the patient with dysthymia has its roots in the past, reworking the past is not seen as necessary for change to occur.
The cognitive approach is more collaborative and problem-solving than traditional psychotherapy. The therapist questions, and the patient responds. Periods of monologue are uncommon, and dialogue prevails. How the patient thinks is assumed to have an impact on affect (e.g., sadness) and behavior (e.g., withdrawal). The primary focus is on meanings (expectations, beliefs, assumptions, attributions). The therapist often assigns homework to set the expectation that the patient will work between sessions and to structure the nature of that work.
Cognitive therapy is concerned with conscious thought, and the construct of an unconscious is not employed. While the relationship between therapist and patient may be a focus (at times) for the cognitive inquiry, transference is not encouraged, assumed, or interpreted as such.
Standard cognitive interventions encourage the patient:
- to take responsibility for an aspect of the problem;
- to take reasonable risks;
- to consider assertive behaviors;
- to express feelings appropriately.
Key elements The automatic thought is the central feature of cognitive therapy (Table 3). In psychoanalytic terminology, automatic thoughts would be considered “pre-conscious” (accessible but requiring attention to be identified). The early sessions of cognitive therapy are usually devoted to identifying the thoughts associated with the patient’s distress. In dysthymia, these thoughts may concern the patient’s self-view, his or her representation of a significant relationship, or a meaningful situation.
Errors in thinking are another important consideration for the cognitive therapist. In dysthymia, typical errors in a patient’s thinking include:
- polarization (black-and-white thinking);
- personalization (inordinate focus on the self);
- overgeneralization (drawing conclusions beyond the scope of the data).
Case 1: ‘There’s something wrong with me’
Rebecca, age 38, was referred to me by her former psychodynamic therapist for a course of cognitive therapy.
The older of two daughters in a middle-class family, Rebecca said she had been depressed “for as long as she could remember.” Recently, her sister died suddenly of a heart attack. Her mother had died at a young age from complications of hypertension, and her father died 2 years ago of lung cancer. This left Rebecca alone, but that was not the whole story.
Her memories of childhood were dominated by her father’s physical abuse of her mother and his negative and critical commentary about Rebecca. She described her sister, too, as “mean and inaccessible.” Not surprisingly, Rebecca poured herself into schoolwork, and she did extremely well. After college, she passed a challenging CPA exam and began a career in accounting. Although her work was fulfilling, she described “an inner voice” that was constantly belittling and blaming her. Relationships with men always ended badly, with Rebecca believing: “There’s something wrong with me; that’s why I always end up alone.”
MAJOR FEATURES OF COGNITIVE THERAPY
After each relationship ended with disappointment, Rebecca would overgeneralize: “All men criticize me,” and then personalize: “So, I must be bad.” She had no physical symptoms of depression other than constant low energy and easy fatigue, along with low self-esteem.
Prior to consulting me, she had been treated unsuccessfully with an assortment of antidepressant medications. For 10 years, she had been treated with psychodynamic psychotherapy by a competent therapist with whom she had a “wonderful relationship.” Unfortunately, little had changed.
Comment My diagnosis was dysthymic disorder, 300.40. Rather than attempting another trial with antidepressants, I recommended—and she agreed to—weekly cognitive therapy sessions for an undetermined duration.
Once the dysthymic patient’s automatic thoughts have been identified, adopting alternate ways of thinking can bring about change. The therapist’s task is to teach disputation techniques and consideration of options. If a cognitive error is recurrent, calling attention to it may facilitate change.
Figure 1 TRIPLE COLUMN TECHNIQUE
Disputation is typically done in conversation, but some patients with dysthymia learn the process more easily when it is demonstrated visually. One effective approach is the triple column technique, in which situations, feelings, and thoughts are illustrated on a chalkboard (Figure 1).
Rebecca’s intake evaluation was completed in the initial session. I taught her the cognitive method for identifying automatic thoughts at the beginning of session two, using the blackboard to illustrate the relationship between situations and responses.
Primitive animals, I told her, do little more than respond to stimuli. Humans, however, assign a meaning to the situation that will affect their response, whether it is a feeling or a behavior. Cognitive therapy focuses on these meanings. I used her history to illustrate how the model worked.
Encouraged to talk about something distressing, Rebecca described in detail a love relationship that was ending. Cued by her distress at various points in the discussion, I asked about relevant meanings. She located a series of personalized and polarized assumptions with ease. We worked to separate her boyfriend’s contribution to the relationship’s outcome from her own. We labeled the errors in her thinking. She had a surprisingly easy time coming up with alternate ways to view the situations we discussed (Figure 2).
Searching for alternate meanings
Shift of set is another useful approach to disputation. Often a patient has searched diligently for answers to his or her problems and has come up “empty.” The patient many times describes this process as “feeling trapped.” With shift of set, the therapist uses metaphor, humor, or self-disclosure to analyze the problem from another perspective. Asking the patient to comment on the therapist’s “story” often elicits an alternative applicable to the patient’s own circumstance.
Metaphor It is beyond the scope of this article to consider the place of metaphor (or analogy) in psychotherapy. To explore the subject further, you might consult an excellent book by Barker.12
Humor is a useful accessory to disputation in cognitive therapy. Be forewarned, however, that the dysthymic patient may distort the point of the joke and personalize it as an insult. When a therapist is naturally witty or funny, I encourage him or her to use this resource. If not, it is better to avoid attempts at humor.
Self-disclosure Traditional psychotherapy preaches the avoidance of self-disclosure, which risks (even momentarily) shifting the focus from the patient to the therapist and breaking the rhythm of the therapy hour. Even so, I have found that properly thought-out self-disclosure can be useful in cognitive therapy.
Consistent with the power in a shift of set, self-disclosure offers the benefits of surprise, a sign of caring and involvement, and a chance for the patient to learn. A recent report by the Group for the Advancement of Psychiatry addresses self-disclosure in detail.13
Polls and balance sheets At times the therapist may suggest an experiment aimed at generating useful alternatives. Questioning peers or friends (poll-taking) may be one way for the patient to elicit viable options. Another tool for making particularly difficult decisions is a balance sheet (either written or conversational) in which the patient lists the pros and cons of various alternatives. When choices are identified, the patient and therapist typically discuss their consequences.
Resolution: ‘Feeling empowered’
By session four, Rebecca reported using the cognitive method regularly, and finding that she was “no longer accepting the conclusions she used to jump to.” She noticed that when she responded differently, others responded differently to her as well. She was “beginning to feel empowered,” she said.