Parameters of CBT

Format

An individual format is preferred for CBT because it allows for better tailoring of treatment to meet the needs of specific patients. Patients receive more attention and are generally more involved in treatment when they have the opportunity to work with and build a relationship with a single therapist over time. Individual treatment affords greater flexibility in scheduling sessions and eliminates the problem of either having to deliver treatment in a "rolling admissions" format or asking patients to wait several weeks until sufficient numbers of patients are recruited to form a group. Also, the comparatively high rates of retention in programs and studies may reflect, in part, particular advantages of individual treatment.

However, a number of researchers and clinicians have emphasized the unique benefits of delivering treatment to substance users in the group format (e.g., universality, peer pressure). It is relatively straightforward to adapt the treatment described in this manual for groups. This generally requires lengthening the sessions to 90 minutes to allow all group members to have an opportunity to comment on their personal experiences in trying out skills, give examples, and participate in role-playing. Treatment will also be more structured in a group format because of the need to present the key ideas and skills in a more didactic, less individualized format.

Length

CBT has been offered in 12 to 16 sessions, usually over 12 weeks. This comparatively brief, short-term treatment is intended to produce initial abstinence and stabilization. In many cases, this is sufficient to bring about sustained improvement for as long as a year after treatment ends. Preliminary data suggest that patients who are able to attain 3 or more weeks of continuous abstinence from cocaine during the 12-week treatment period are generally able to maintain good outcome during the 12 months after treatment ends. For many patients, however, brief treatment is not sufficient to produce stabilization or lasting improvement. In these cases, CBT is seen as preparation for longer term treatment. Further treatment is recommended directly when the patient requests it or when the patient has not been able to achieve 3 or more weeks of continuous abstinence during the initial treatment. We are currently evaluating whether additional booster sessions of CBT during the 6 months following the initial treatment phase improves outcome. The maintenance version of CBT focuses on the following:

• Identifying situations, affects, and cognitions that remain problematic for patients in their efforts to maintain abstinence or which emerge after cessation or reduction of cocaine use.

• Maintaining gains through solidifying the more effective coping skills and strategies the subject has implemented.

• Encouraging patient involvement in activities and relationships that are incompatible with drug use. Rather than introducing new material or skills, the maintenance version of CBT focuses on broadening and mastering the skills to which the patient was exposed during the initial phase of treatment.

Setting

Treatment is usually delivered on an outpatient basis for several reasons:

• CBT focuses on understanding the determinants of substance use, and this is best done in the context of the patient's day-to-day life. By understanding who the patients are, where they live, and how they spend their time, therapists can develop more elaborate functional analyses.

• Skills training is most effective when patients have an opportunity to practice new skills and approaches within the context of their daily routine, learn what does and does not work for them, and discuss new strategies with the therapist.

Patients

CBT has been evaluated with a broad range of cocaine abusers. The following are generally not appropriate for CBT delivered on an out-patient basis:

• Those who have psychotic or bipolar disorders and are not stabilized on medication

• Those who have no stable living arrangements

• Those who are not medically stable (as assessed by a pretreatment physical examination)

• Those who have other concurrent substance dependence disorders, with the exception of alcohol or marijuana dependence (although we assess the need for alcohol detoxification in the former)

No significant differences have been found in outcome or retention for patients who seek treatment because of court or probation pressure and those who have DSM-IV diagnoses of antisocial personality disorder or other Axis II disorders, nor has outcome varied by patient race/ethnicity or gender.