Dialectical Behaviour Therapy

STAGES OF THERAPY AND TREATMENT TARGETS

Patients with BPD present multiple problems and this can pose problems for the therapist in deciding what to focus on and when. This problem is directly addressed in DBT. The course of therapy over time is organised into a number of stages and structured in terms of hierarchies of targets at each stage.

The PRE-TREATMENT STAGE focuses on assessment, commitment and orientation to therapy.

STAGE 1 focuses on suicidal behaviours, therapy interfering behaviours and behaviours that interfere with the quality of life, together with developing the necessary skills to resolve these problems.

STAGE 2 deals with post-traumatic stress related problems (PTSD)

STAGE 3 focuses on self-esteem and individual treatment goals.

The targeted behaviours of each stage are brought under control before moving on to the next phase. In particular post-traumatic stress related problems such as those related to childhood sexual abuse are not dealt with directly until stage 1 has been successfully completed. To do so would risk an increase in serious self injury. Problems of this type (flashbacks for instance) emerging whilst the patient is still in stages 1 or 2 are dealt with using 'distress tolerance' techniques. The treatment of PTSD in stage 2 involves exposure to memories of the past trauma.

Therapy at each stage is focused on the specific targets for that stage which are arranged in a definite hierarchy of relative importance. The hierarchy of targets varies between the different modes of therapy but it is essential for therapists working in each mode to be clear what the targets are. An overall goal in every mode of therapy is to increase dialectical thinking.

The hierarchy of targets in individual therapy for example is as follows:

1. Decreasing suicidal behaviours.
2. Decreasing therapy interfering behaviours.
3. Decreasing behaviours that interfere with the quality of life.
4. Increasing behavioural skills.
5. Decreasing behaviours related to post-traumatic stress.
6. Improving self esteem.
7. Individual targets negotiated with the patient.

In any individual session these targets must be dealt with in that order. In particular, any incident of self harm that may have occurred since the last session must be dealt with first and the therapist must not allow him or herself to be distracted from this goal.

The importance given to 'therapy interfering behaviours' is a particular characteristic of DBT and reflects the difficulty of working with these patients. It is second only to suicidal behaviours in importance. These are any behaviours by the patient or therapist that interfere in any way with the proper conduct of therapy and risk preventing the patient from getting the help she needs. They include, for example, failure to attend sessions reliably, failure to keep to contracted agreements, or behaviours that overstep therapist limits.

Behaviours that interfere with the quality of life are such things as drug or alcohol abuse, sexual promiscuity, high risk behaviour and the like. What is or is not a quality of life interfering behaviour may be a matter for negotiation between patient and therapist.

The patient is required to record instances of targeted behaviours on the weekly diary cards. Failure to do so is regarded as therapy interfering behaviour.

TREATMENT STRATEGIES

Within this framework of stages, target hierarchies and modes of therapy a wide variety of therapeutic strategies and specific techniques is applied.

The core strategies in DBT are 'validation' and 'problem solving'. Attempts to facilitate change are surrounded by interventions that validate the patient's behaviour and responses as understandable in relation to her current life situation, and that show an understanding of her difficulties and suffering.

Problem solving focuses on the establishment of necessary skills. If the patient is not dealing with her problems effectively then it is to be anticipated either that she does not have the necessary skills to do so, or does have the skills but is prevented from using them. If she does not have the skills then she will need to learn them. This is the purpose of the skills training.

Having the skills, she may be prevented from using them in particular situations either because of environmental factors or because of emotional or cognitive problems getting in the way. To deal with these difficulties the following techniques may be applied in the course of therapy:

1. Contingency management
2. Cognitive therapy
3. Exposure based therapies
4. Pharmacotherapy

The principles of using these techniques are precisely those applying to their use in other contexts and will not be described in any detail. In DBT however they are used in a relatively informal way and interwoven into therapy. Linehan recommends that medication be prescribed by someone other than the primary therapist although this may not be practical.

Particular note should be made of the pervading application of contingency management throughout therapy, using the relationship with the therapist as the main reinforcer. In the session by session course of therapy care is taken to systematically reinforce targeted adaptive behaviours and to avoid reinforcing targeted maladaptive behaviours. This process is made quite overt to the patient, explaining that behaviour which reinforced can be expected to increase. A clear distinction is made between the observed effect of reinforcement and the motivation of the behaviour, pointing out that such a relationship between cause and effect does not imply that the behaviour is being carried out deliberately in order to obtain the reinforcement. Didactic teaching and insight strategies may also be used to help the patient achieve an understanding of the factors that may be controlling her behaviour.

The same contingency management approach is taken in dealing with behaviours that overstep the therapist's personal limits in which case they are referred to as 'observing limits procedures'.

Problem solving and change strategies are again balanced dialectically by the use of validation strategies. It is important at every stage to convey to the patient that her behaviour, including thoughts feelings and actions are understandable, even though they may be maladaptive or unhelpful.

Significant instances of targeted maladaptive behaviour occurring since the last session (which should have been recorded on the diary card) are initially dealt with by carrying out a detailed 'behavioural analysis'. In particular every single instance of suicidal or parasuicidal behaviour is dealt with in this way. Such behavioural analysis is an important aspect of DBT and may take up a large proportion of therapy time.

In the course of a typical behavioural analysis a particular instance of behaviour is first clearly defined in specific terms and then a 'chain analysis' is conducted, looking in detail at the sequence of events and attempting to link these events one to another. In the course of this process hypotheses are generated about the factors that may be controlling the behaviour. This is followed by, or interwoven with, a 'solution analysis' in which alternative ways of dealing with the situation at each stage are considered and evaluated. Finally one solution should be chosen for future implementation. Difficulties that may be experienced in carrying out this solution are considered and strategies of dealing with these can be worked out.

It is frequently the case that patients will attempt to avoid this behavioural analysis since they may experience the process of looking in such detail at their behaviour as aversive. However it is essential that the therapist should not be side tracked until the process is completed. In addition to achieving an understanding of the factors controlling behaviour, behavioural analysis can be seen as part of contingency management strategy, applying a somewhat aversive consequence to an episode of targeted maladaptive behaviour. The process can also be seen as an exposure technique helping to desensitise the patient to painful feelings and behaviours. Having completed the behavioural analysis the patient can then be rewarded with a 'heart to heart' conversation about the things she likes to discuss.

Behavioural analysis can be seen as a way of responding to maladaptive behaviour, and in particular to parasuicide, in a way that shows interest and concern but which avoids reinforcing the behaviour.

In DBT a particular approach is taken in dealing with the network of people with whom the patient is involved personally and professionally. These are referred to as 'case management strategies'. The basic idea is that the patient should be encouraged, with appropriate help and support, to deal with her own problems in the environment in which they occur. Therefore, as far as possible, the therapist does not do things for the patient but encourages the patient to do things for herself. This includes dealing with other professionals who may be involved with the patient. The therapist does not try to tell these other professionals how to deal with the patient but helps the patient learn how to deal with the other professionals. Inconsistencies between professionals are seen as inevitable and not necessarily something to be avoided. Such inconsistencies are rather seen as opportunities for the patient to practice her interpersonal effectiveness skills. If she grumbles about the help she is receiving from another professional she is helped to sort this out herself with the person involved. This is referred to as the 'consultation-to-the-patient strategy' which, among other things, serves to minimise the so-called "staff splitting" which tends to occur between professionals dealing with these patients.

Environmental intervention is acceptable but only in very specific situations where a particular outcome seems essential and the patient does not have the power or capability to produce this outcome. Such intervention should be the exception rather than the rule.

EMPIRICAL EVIDENCE

The effectiveness of DBT has been assessed in two major trials. The first (Linehan et al, 1991) compared the effectiveness of DBT relative to treatment as usual (TAU). The second (Linehan et al, in press) examined the effectiveness of DBT skills training when added to standard community psychotherapy.

In the first randomised controlled trial, there were three main goals:

Firstly, to reduce the frequency of parasuicidal behaviours. This is clearly of importance because of the distressing nature of the behaviour but also because of the increased risk of completed suicide in this group (Stone, 1987).

Secondly, to reduce behaviours that interfere with the progress of therapy ('therapy interfering behaviours'), as the attrition rate from therapy in borderline women with a history of parasuicidal behaviours is high.

Finally, to reduce behaviours that interfere with the patients' quality of life. In this study this latter goal was interpreted more specifically as a reduction in in-patient psychiatric days, which is hypothesised to interfere with the patient's quality of life.

Participants all met DSM-IIIR criteria for BPD, and were matched for number of lifetime parasuicide episodes, number of lifetime admissions to hospital, age and anticipated good or poor prognosis.

There were 22 patients in each group. The experimental group received standard DBT as outlined above. The experience of the patients in the treatment as usual group was variable; some received regular individual psychotherapy, others dropped out of individual therapy whilst continuing to have access to in-patient and day-patient services. All participants were assessed on number of parasuicidal episodes and a range of questionnaire measures of mood. Patients were blindly assessed at pre-treatment, 4, 8 and 12 months and followed up at 6 and 12 months post-treatment. Measures of treatment compliance and other treatment delivered (e.g. in patient psychiatric days) were also taken. At pre-treatment there were no significant differences on any of the measures between the control and experimental groups including demographic criteria.

With regard to the first aim of the trial (i.e. the reduction of suicidal behaviour), during the year of treatment patients in the control group engaged in more parasuicidal acts than DBT patients at all time points. The medical risk for parasuicidal acts was higher in the control group than in the DBT group.

Patients in the DBT group were more likely to start therapy and were more likely to remain in therapy than those in the control group. The one year attrition rate in the DBT group was 16.7% compared to 50% for those in the control group who commenced the year with a new therapist. The DBT patients reported more individual and group therapy treatment hours per week than the TAU group, which reflects the intensive nature of DBT treatment. However, the control patients reported more day treatment hours per week.

With regard to the third goal of the trial, patients in the control group had significantly more inpatient psychiatric days per person than those receiving DBT (38.6 days per year as compared to 8.46 days per year for the DBT group).

These results were considered to indicate the superiority of DBT over treatment as usual. However, one major criticism of the trial is that the variable and patchy therapeutic experience of the control group may be considered to favour DBT. This criticism can be challenged, however, since one of the treatment aims of DBT is to keep the patient in therapy. This it seems to have succeeded in doing. However, it is still pertinent to enquire how well DBT would compare to a consistent treatment alternative. An attempt was made to explore this by comparing the DBT patients with those in the TAU group who received regular individual therapy. It was found that the gains of the patients in the DBT group over the TAU group remained even using this more rigorous comparison.

Despite the more intensive nature of DBT it remained cheaper than TAU, largely because of the reduction in the number of in-patient and day-treatment days received by the DBT patients.

It is of interest that, although the DBT patients showed significant gains across the three areas of interest (number of parasuicides, treatment compliance and inpatient days), there were no between-group differences on any of the questionnaire measures of mood and suicidal ideation. During the follow-up year, patients in the DBT group had higher Global Assessment Scores and a better work performance than the patients in the TAU group. In the first 6 months, DBT patients had fewer suicidal acts, lower anger scores and better self-reported social adjustment than TAU patients. In the final 6 months, DBT patients had fewer in-patient days treatment and better interviewer rated social adjustment than TAU patients.

The second trial had two parts. Firstly, it compared standard community psychotherapy (SCP) plus the group skills component of DBT with SCP alone without added skills training. Secondly, it compared the SCP group from the first part of the present study with the experimental group in the previously described randomised control trial. In this latter comparison, assignment to conditions was not random. However, all subjects were screened in the same way, during the same time frame and were all subject to blind assessment.

The results of the first part of this study indicated that the addition of DBT skills training to SCP for this group of parasuicidal borderline women did not confer any additional therapeutic benefit. In this part of the study the skills training was truly ancillary in that there were no meetings between the individual therapists and the group therapists, nor were any attempts made to assist the patient to generalise the skills learnt in the group to her everyday life.

In the second part of the study there were some pre-treatment differences between the two groups. The DBT patients were less depressed than the control group and reported higher levels of unemployment. These differences were not considered to be particularly important for three reasons. Firstly, depression was not correlated with any of the outcome variables. Secondly, although the lower depression scores favoured the DBT group, the lower unemployment favoured the SCP group. Finally, the levels of depression did not differ between the two groups after the pre-treament point.

During the treatment year there were no significant differences between the groups with regard to staying in therapy. There were some slight differences in the distribution of therapeutic hours, with DBT patients reporting more group treatment hours than the SCP group. Most importantly, however, there were no significant relationships between number of treatment hours and any of the outcome variables. Over the treatment year, standard DBT patients compared to SCP patients had fewer parasuicidal episodes, fewer episodes leading to medical treatment and fewer psychiatric in-patient days. DBT patients also reported less anger than the SCP patients.

This research then provides some evidence for the therapeutic efficacy of DBT. This evidence is primarily derived from one randomised control trial in which DBT was found to be superior on a number of variables to treatment as usual. Clearly this finding requires replication. There is also some evidence to suggest that DBT is superior to other forms of psychotherapy with this group of patients. However, this result comes from a comparison made using only a sub-sample of patients in the randomised trial (Linehan et al, 1991) and from a further comparison between two groups from different studies (Linehan et al, in press). Consequently, the effectiveness of DBT compared to other alternative treatments awaits further exploration. This will remain a challenge, particularly given the high drop-out rates from treatment of this group of patients.

SUMMARY AND CONCLUSIONS

Dialectical Behaviour Therapy then is a novel method of therapy specifically designed to meet the needs of patients with Borderline Personality Disorder and their therapists. It directly addresses the problem of keeping these patients in therapy and the difficulty of maintaining therapist motivation and professional well-being. It is based on a clear and potentially testable theory of BPD and encourages a positive and validating attitude to these patients in the light of this theory. The approach incorporates what is valuable from other forms of therapy, and is based on a clear acknowledgement of the value of a strong relationship between therapist and patient. Therapy is clearly structured in stages and at each stage a clear hierarchy of targets is defined. The method offers a particularly helpful approach to the management of parasuicide with a clearly defined response to such behaviours. The techniques used in DBT are extensive and varied, addressing essentially every aspect of therapy and they are underpinned by a dialectical philosophy that recommends a balanced, flexible and systemic approach to the work of therapy. Techniques for achieving change are balanced by techniques of acceptance, problem solving is surrounded by validation, confrontation is balanced by understanding. The patient is helped to understand her problem behaviours and then deal with situations more effectively. She is taught the necessary skills to enable her to do so and helped to deal with any problems that she may have in applying them in her natural environment. Generalisation outside therapy is not assumed but encouraged directly. Advice and support available between sessions and the patient is encouraged and helped to take responsibility for dealing with life's challenges herself. The method is supported by empirical evidence which suggests that it is successful in reducing self-injury and time spent in psychiatric in-patient treatment.