Psychotherapy for patients with complex disorders and chronic symptoms. The need for a new research paradigm

Acceptance and commitment-based therapy for patients with psychiatric and physical health conditions in routine general hospital care - Development, implementation and outcomes

OBJECTIVE

Transdiagnostic approaches are needed to effectively treat patients with a broad range of diagnoses and comorbidities in routine general hospital care. Yet the evidence for the effectiveness of treatments beyond Cognitive Behavioral Therapy (CBT) is largely lacking. We describe the process of implementing an interdisciplinary multi-professional Acceptance and Commitment Therapy (ACT)-based treatment for patients with psychiatric and physical health conditions and present outcomes before and after implementation.

METHOD

The present investigation was a naturalistic comparative study comparing ACT-based (n = 126) vs. CBT-based (n = 127) treatments in a psychiatric day hospital in Berlin, Germany. Within- and between-group changes (pre- to post-treatment) in everyday functioning and health-related quality of life (primary outcomes; assessed by the Short Form 36 (SF-36)), as well as anxiety and depressive symptoms (secondary outcomes; assessed by the Hospital Anxiety and Depression Scale (HADS) and Beck Depression Inventory-II (BDI-II)), were analyzed with Generalized Linear Models, and Wilcoxon signed-rank tests and effect size r.

RESULTS

Data analysis showed statistically significant improvements from pre- to post-treatment (r ranging from 0.27 to 0.61, p < 0.001) for most SF-36 scales as well as for all HADS and BDI-II scores (r ranging from 0.38 to 0.60, p < 0.001) for both the ACT and CBT groups. ACT and CBT showed comparable effects in relation to clinical outcomes.

CONCLUSION

An interdisciplinary multi-professional ACT-based group treatment is a valuable approach for patients with psychiatric and physical health conditions in real-life hospital settings, with effects equivalent to CBT interventions.

The Güttingen study of psychoanalytic therapy: First results

Results of a naturalistic study of the effectiveness of psychoanalytic therapy are reported. Outcome data are presented for a sample of N = 36 patients who were treated with psychoanalytic therapy. For a sample of n = 23 of these patients, data for 1-year follow-up are available at present. According to the results, psychoanalytic therapy yielded significant improvements in symptoms (Symptom Checklist 90-R, SCL-90-R and rating of psychoanalysts), in interpersonal problems (Inventory of Interpersonal Problems, IIP), in quality of life (Questionnaire of Quality of Life, FLZ), in well-being (Questionnaire of Changes in Experience and Behaviour VEV) and in target problems defined by the patients (Goal Attainment Scaling, GAS). Large effect sizes between 1.28 and 2.48 were found in symptoms (GSI of the SCL-90-R), interpersonal problems (IIP-total), quality of life (FLZ-total), well-being (VEV) and target problems (GAS). At 1-year follow-up, all improvements proved to be stable or even increased. The self-reported improvements in symptoms were corroborated by the ratings of the psychoanalysts. At the end of therapy, 77% of the patients showed clinically significant improvements. In the 1-year follow-up group, this was true for 80%. Further results are presented and discussed.

Are psychodynamic and psychoanalytic therapies effective? A review of empirical data

There is a need for empirical outcome research in psychodynamic and psychoanalytic therapy. However, both the approach of empirically supported therapies (EST) and the procedures of evidence-based medicine (EBM) have severe limitations making randomised controlled trials (RCTs) an absolute standard. After a critical discussion of this approach, the author reviews the empirical evidence for the efficacy of psychodynamic psychotherapy in specific psychiatric disorders. The review aims to identify for which psychiatric disorders RCTs of specific models of psychodynamic psychotherapy are available and for which they are lacking, thus providing a basis for planning further research. In addition, results of process research of psychodynamic psychotherapy are presented. As the methodology of RCTs is not appropriate for psychoanalytic therapy, effectiveness studies of psychoanalytic therapy are reviewed as well. Studies of psychodynamic psychotherapy published between 1960 and 2004 were identified by a computerised search using Medline, PsycINFO and Current Contents. In addition, textbooks and journal articles were used. Twenty-two RCTs were identified of which 64% had not been included in the 1998 report by Chambless and Hollon. According to the results, for the following psychiatric disorders at least one RCT providing evidence for the efficacy of psychodynamic psychotherapy was identified: depressive disorders (4 RCTs), anxiety disorders (1 RCT), post-traumatic stress disorder (1 RCT), somatoform disorder (4 RCTs), bulimia nervosa (3 RCTs), anorexia nervosa (2 RCTs), borderline personality disorder (2 RCTs), Cluster C personality disorder (1 RCT), and substance-related disorders (4 RCTs). According to results of process research, outcome in psychodynamic psychotherapy is related to the competent delivery of therapeutic techniques and to the development of a therapeutic alliance. With regard to psychoanalytic therapy, controlled quasi-experimental effectiveness studies provide evidence that psychoanalytic therapy is (1) more effective than no treatment or treatment as usual, and (2) more effective than shorter forms of psychodynamic therapy. Conclusions are drawn for future research.

Special Section: Setting the World on Wheels: Some Clinical Challenges of Evidence-Based Practice

This article critically examines the aims and methods of evidence-based practice (EBP) with particular reference to group psychotherapy. Six challenges posed by EBP for every psychotherapist are described.

Evaluating complex interventions: perspectives and issues for health behaviour change interventions

OBJECTIVE

Health behaviour change interventions (HBCIs), used in health education, health promotion, patient education and psychotherapy areas, are considered complex interventions. The objective of this article is to discuss the value and limitations of using randomised clinical trials (RCTs) to asses HBCIs.

METHODS

A scoping review of the literature was conducted to identify the main challenges of using RCTs for evaluating HBCIs. The issues were illustrated by case studies selected from research conducted by our multidisciplinary team.

RESULTS

In complex interventions, effects are produced not only by the intervention, but are strongly linked to context. Issues relating to transferability of results are therefore critical, and require adjustments to the RCT model. Sampling bias, biases related to the experimental conditions and biases due to the absence of double-blindness were examined and illustrated by case studies.

CONCLUSION

The results underline the importance of a multidisciplinary approach. They call for adapted or alternative evaluation models that overcome the limitations of RCTs.

Efficacy and acceptability of acute treatments for persistent depressive disorder: a network meta-analysis

BACKGROUND

We aimed to synthesize the available evidence on the relative efficacy and acceptability of specific treatments for persistent depressive disorder.

METHODS

We searched several databases up to January 2013 and included randomized controlled trials that compared acute pharmacological, psychotherapeutic, and combined interventions with each other or placebo. The outcome measures were the proportion of patients who responded to (efficacy) or dropped out from (acceptability) the allocated treatment. Data synthesis was performed with network meta-analysis.

RESULTS

A network of 45 trials that tested 28 drugs included data from 5,806 and 5,348 patients concerning efficacy and acceptability, respectively. A second network of 15 trials that tested five psychotherapeutic and five combined interventions included data from 2,657 and 2,719 patients concerning efficacy and acceptability, respectively. Among sufficiently tested treatments, fluoxetine (odds ratio (OR) 2.94), paroxetine (3.79), sertraline (4.47), moclobemide (6.98), imipramine (4.53), ritanserin (2.35), amisulpride (5.63), and acetyl-l-carnitine (5.67) were significantly more effective than placebo. Pairwise comparisons showed advantages of moclobemide (2.38) and amisulpride (1.92) over fluoxetine. Sertraline (0.57) and amisulpride (0.53) showed a lower dropout rate than imipramine. Interpersonal psychotherapy with medication outperformed medication alone in chronic major depression but not in dysthymia. Evidence on cognitive behavioral analysis system of psychotherapy plus medication was partly inconclusive. Interpersonal psychotherapy was less effective than medication (0.48) and cognitive behavioral analysis system of psychotherapy (0.45). Several other treatments were tested in single studies.

CONCLUSIONS

Several evidence-based acute pharmacological, psychotherapeutic, and combined treatments for persistent depressive disorder are available with significant differences between them.

What do patients find helpful in psychotherapy? Implications for the therapeutic relationship in mental health nursing

This study examined client perception of the therapeutic impact of two models of therapy delivered by mental health nurses and clinical psychologists respectively - psychodynamic interpersonal therapy (PIT) and cognitive behavioural therapy (CBT). A non-equivalent groups design was used in order to benchmark results against Llewelyn et al.: one group received PIT and the other received CBT. This design was utilized principally because the research was conducted across two practice settings where randomization was not feasible. We used two intact groups in practice research settings that received the therapies as reported in Llewelyn et al. Sixty-one clients receiving CBT or PIT in practice research settings completed a Helpful Aspects of Therapy form after each session in order to measure client perceptions of helpful and hindering events in therapy. Only two out of the 13 impacts were rated as significantly different. PIT clients reported higher levels of 'awareness' than CBT clients, whereas CBT clients reported higher levels of problem solution than PIT clients. The results replicate Llewelyn et al.'s findings in that clients experienced theoretically different models of therapy as broadly similar in their therapeutic impact. We argue that this provides some support for the influence of 'common' rather than 'specific' factors in psychotherapy effectiveness in mental health nursing.

Dabigatran - a case history demonstrating the need for comprehensive approaches to optimize the use of new drugs

BACKGROUND

There are potential conflicts between authorities and companies to fund new premium priced drugs especially where there are safety and/or budget concerns. Dabigatran, a new oral anticoagulant for the prevention of stroke in patients with non-valvular atrial fibrillation (AF), exemplifies this issue. Whilst new effective treatments are needed, there are issues in the elderly with dabigatran due to variable drug concentrations, no known antidote and dependence on renal elimination. Published studies have shown dabigatran to be cost-effective but there are budget concerns given the prevalence of AF. There are also issues with potentially re-designing anticoagulant services. This has resulted in activities across countries to better manage its use.

OBJECTIVE

To (i) review authority activities in over 30 countries and regions, (ii) use the findings to develop new models to better manage the entry of new drugs, and (iii) review the implications for all major stakeholder groups.

METHODOLOGY

Descriptive review and appraisal of activities regarding dabigatran and the development of guidance for groups through an iterative process.

RESULTS

There has been a plethora of activities among authorities to manage the prescribing of dabigatran including extensive pre-launch activities, risk sharing arrangements, prescribing restrictions, and monitoring of prescribing post-launch. Reimbursement has been denied in some countries due to concerns with its budget impact and/or excessive bleeding. Development of a new model and future guidance is proposed to better manage the entry of new drugs, centering on three pillars of pre-, peri-, and post-launch activities.

CONCLUSION

Models for introducing new drugs are essential to optimize their prescribing especially where there are concerns. Without such models, new drugs may be withdrawn prematurely and/or struggle for funding.

Mind, brain and psychotherapy

There is long-standing debate about superiority of mind over brain, in other words about superiority of mind over matter. And outcome of this debate is going to decide future of psychiatry. The psychiatrists believing in materialism may say that brain is all and by changing neurotransmitters level with new molecules of drugs would cure all illnesses. On the other hand, antipsychiatry activists and some psychotherapists oppose all types of treatment despite of convincing evidence that drug therapy is effective (although sometimes it is not as effective as it claims to be). However, truth lies somewhere in between. Pharmacotherapy and psychotherapy are like two legs of psychiatry and psychiatry cannot walk into a future on one leg. The studies have shown that judicious use of pharmacotherapy along with psychotherapy gives better outcome than any one of them used alone. We must heal dichotomy between mind and brain before we heal the patients.

[New directions for psychotherapy research: an evaluation of a research protocol and a methodological and technical framework proposal]

INTRODUCTION

A recent report of the French research institute INSERM, based on a comprehensive review of the work done on the evaluation of psychotherapies Psychothérapies: trois approches évaluées, has shown the lack of research in France on this topic, notably in psychodynamic psychotherapy. The development of such research is needed. The first part of the paper deals with the limits of the third generation of studies on psychotherapy (medical model, use of RCT, DSM...) on which the INSERM report is based and reviews the existing propositions for a fourth generation of research in the field. METHODOLOGICAL FINDINGS: In the second part, a process-outcome research protocol developed by the authors, according to these new proposals as well as several on-going researches [J Clin Psychol, 27 2 (1998) 217-26, J Pragm Case Stud 3 (2000)(2), Arch Gen Psychiatry 59 (2002) 505-10, Psychother Res 12 3 (2002) 251-72 and Br J Psychiatry 165 (1994) 4-8] is presented. The proposed methodology is based on controlled single case studies. Quantitative and qualitative data are associated for the definition of the diagnosis, as well as initial, intermediate and final measures. Process analysis is used to describe the main characteristics of the on-going psychotherapy at different moments in time. It is thus possible to gain access to what is really done during the therapy and not only to what is supposed to be done, based on a manual or even on the name of the theory used by the therapist.

DESIGN OF THE STUDY

This methodology was tested during a one-year pilot study, in true conditions of psychotherapy with outpatients. The different phases of the analysis are presented: several tools dedicated to the observation, formalisation and data analysis are integrated in a coherent iterative process during the whole therapy. The interests and limits of each tool (ESM, DSM, PPQS, Hoglend, CORE...) are described together with the first results of the pilot study.

DISCUSSION

The overall architecture of a database designed to collect, search and analyse data is provided in the last part of the paper.

CONCLUSION

This framework offers two possibilities at the same time: it provides therapists with the ability to follow the evolution of their cases and to compare them with similar cases. It provides researchers with the ability to drive true comparative analysis, based on psychotherapies conducted in real situations and on detailed-enough descriptions to obtain significant outcomes.

Psychotherapy and mental health teams

Mental health teams in different configurations and settings are under increasing pressure to offer formal psychotherapies as well as psychologically informed management to large numbers of 'difficult' patients with severe and complex presentations. This pressure has arisen variously from consumers, governmental agencies and commissioning bodies. Although these teams are an important resource, they receive limited training, supervision or support in models of psychotherapy, especially those incorporating a relational dimension and offering a coherent 'common language'. This commonly results in impairment of collective team function, including the quality and consistency of assessments, and may result in stress, splitting and 'burn out' for team members. This situation is due in part to their burden of casework and responsibility but also to prevailing, largely symptom-based and biomedical, models of mental disorder which tend to minimize the importance of psychosocial dimensions in either aetiology or treatment. Formulating and delivering appropriate, evidence-based and robust models of psychotherapy in generic team settings represents a significantly different challenge from that posed by delivery of psychotherapy in specialist settings. Approaches to this important challenge are discussed and summarized drawing on general considerations and the limited direct research evidence, and are illustrated by a cognitive analytic therapy (CAT)-based training project.

Distinction, limites et complémentarité des recherches d’efficacité potentielle et d’efficacité réelle : nouvelles perspectives pour la recherche en psychothérapie

Perron et al. (2004) criticize the collective expertise conducted by the INSERM on the efficacy of different psychotherapy methods for different mental disorders. They say the work is biased in favour of Cognitive and Behavioral Therapies (CBT), while there is a negative bias regarding other methods, in particular psychodynamic therapies. Philippe Cialdella, a specialist of methodology and quantitative analysis in psychiatry, exposes an counter-argument in 10 points and brings welcome clarifications on the methodology and statistics. There is neither statistical bias in the INSERM report (which anyway is not a meta-analysis, but a literature analysis), nor in the first or second level studies on which it is based, mainly Randomised Controlled Trials (RCT). Though some arguments of P. Cialdella could be discussed in detail, his work comes to the conclusion that we can thus trust the results of the INSERM on one point: positive results can be obtained by psychotherapy with the experimental patients involved in the RCTs, and these findings are reliable. This is an important result in favour of psychotherapy, but it does not answer a very fundamental question: do we have reliable evidence that there is no systematic difference between the population constituted of patient-treatment-therapist (as a whole) found in RCTs, and the population constituted of patient-treatment-therapist (as a whole) in real contexts? A detailed analysis of what are efficacy studies and their methodology shows that this is not the case, and that it is hence not possible to generalize the results obtained by RCTs to clinical practice in real situations. Comorbidities and complex pathologies, choice of the therapist by the patient, interpersonal factors, conditions of use of manuals, contextual and social parameters, amongst other parameters make the real situation radically different from the RCT one, and the results impossible to generalize. Effectiveness studies in real situations do not solve the problem either. They have low internal validity, and though the population studied is close to a real one, too many uncontrolled parameters make the results unreliable. Moreover, outcome studies, whether they are efficacy or effectiveness studies, generally test a therapy "as a whole" versus another one, as defined in a manual, or by psychotherapy "trademarks". This design totally fails to offer a detailed view of what really happens during the therapy between the patient and the therapist, and it gives no possible insights into the change process elements. Only clinically highly representative quasi-experimental prospective studies can help us to understand change processes in real situations and incrementally improve treatment procedures. Daniel B. Fishman in the year 2000 made an ambitious and really interesting proposal about using pragmatic case studies in a systematic and scientific manner. Numerous reliable methodological tools, such as the Psychotherapy Process Q-Sort for example, as well as the tremendous innovations made in information and communication technologies make it possible today to implement such a proposal. It will enable us to really compare the resulting differences between the different approaches used in clinical settings, in relations with the type of intervention carried or in the real therapies, during clinically significant periods of time, and with various and ecologically valid samples. This is a possible solution to the difficult question of the use of outcome research to improve psychotherapy practice.

Practical behavioral trials to advance evidence-based behavioral medicine

There is a well-documented gap between research and practice in many areas of behavioral medicine. This gap is due in part to limitations in the capacity of the research database to address questions that are of central concern to clinicians, administrative decision makers, and policymakers. Thus, there has been a call for "practical clinical trials" that compare clinically viable alternative interventions and assess multiple outcomes important for clinical and policy decisions in diverse patient populations and settings. Such trials offer great potential, and they raise interesting challenges regarding optimal research design and source of funding. We discuss issues related to practical clinical trials in behavioral medicine, propose a need for practical behavioral trials (PBTs), and describe design features that will facilitate clinical and policy decision making. This type of PBT can help to close the gap between research and practice and advance the field of evidence-based behavioral medicine. We discuss potential challenges and objections to PBTs and conclude by providing recommendations for the design, conduct, reporting, and review of practical trials.

Personality disorders in a Dutch forensic psychiatric sample: changes with treatment

BACKGROUND

Evidence on the effectiveness of treatment for personality disorder (PD) is mixed, and there are very few data at all on outcomes for offender patients with PD. In the Netherlands there is nevertheless commitment to treating such people in specialized forensic psychiatric hospitals.

AIMS/HYPOTHESES

The main aim was to determine the extent to which, if at all, patients detained under the Dutch TBS provision in the Dr Henri Van der Hoeven Hospital changed during inpatient treatment.

METHODS

The study followed a naturalistic design. On admission, the Structured Interview for DSM Personality Disorders (SIDP-R) and the Personality Diagnostic Questionnaire-Revised (PDQ-R) were used to assess DSM axis-II personality disorder pathology. After two years of intensive treatment they were reassessed using self-report questionnaires.

RESULTS

Fifty-nine patients (54 men and five women) completed both ratings. At follow-up, group mean indicated a significant reduction in personality disorder pathology as measured by the PDQ-R. Analysis of changes in individual subjects according to a method described by Jacobson and Truax (1991) showed that almost 40% improved reliably (by more than two standard deviations) and more than one quarter of the sample improved to a reliable and clinically significant extent in personality disorder features.

CONCLUSIONS AND CLINICAL IMPLICATIONS

The findings of the study are encouraging in terms of reduction of personality disorder psychopathology. Limitations to the study design are acknowledged. Further, it is not known whether this change constitutes substantial reorganization of personality, or whether it reflects a change at a more superficial level. Further follow-up of the patients is necessary to investigate whether the positive changes remain after release from hospital.

[Psychotherapy of somatoform disorders]

OBJECTIVES

To present a review of the current state of the art of psychotherapy of somatoform disorders from a psychodynamic-interpersonal perspective.

METHODS

The review is based on an analysis of the literature used for evidence-based guidelines on the treatment of somatoform disorders and on our own experiences and models of these disorders. An elaboration of practical aspects of psychotherapy with these patients makes up an essential part of the review.

RESULTS AND DISCUSSION

Psychotherapy of somatoform disorders is efficient and effective if the typical interpersonal patterns of these patients are taken into account and if the therapist maintains a more active attitude, avoiding early psychosocial interpretations of the somatoform complaints.

Medically unexplained physical symptoms, anxiety, and depression: a meta-analytic review

OBJECTIVE

Our objective was to review and compare, with meta-analytic methods, observational studies on the association of medically unexplained physical symptoms, anxiety, and depression with special emphasis on healthy and organically ill control groups and on different types of symptoms, measures, and illness behavior.

METHODS

A search of MEDLINE and PsycLIT/PsycINFO for abstracts from 1980 to April 2001 was performed; principal investigators in the field were contacted and article reference lists were used to retrieve additional relevant articles. Two hundred forty-four studies were included on the basis of consensus ratings if they fulfilled seven of eight inclusion criteria pertaining to diagnostic accuracy and statistical appropriateness. Five hundred twenty-two studies were deferred or excluded. We focused specifically on the four functional somatic syndromes for which there were sufficient numbers for meta-analytic integration: irritable bowel syndrome (IBS), nonulcer dyspepsia (NUD), fibromyalgia (FM), and chronic fatigue syndrome (CFS). Data were extracted independently by two authors according to a prespecified coding manual with up to 70 parameters per study.

RESULTS

Effect sizes for the association of the four functional somatic syndromes with depression and anxiety were of moderate magnitude but were highly significant statistically when compared with healthy persons and controls with medical disorders of known organic pathology. Moreover, this association was significant whether depression was measured with or without somatic items. Chronic fatigue syndrome is characterized by higher scores of depression, fibromyalgia by lower scores of anxiety than irritable bowel syndrome. Consulting behavior and severity of somatization is related to higher levels of anxiety and depression.

CONCLUSIONS

Meta-analytic integration confirms that the four functional somatic syndromes (IBS, NUD, FM, CFS) are related to (but not fully dependent on) depression and anxiety. At present, there is only limited meta-analytic evidence for the same sort of association for medically unexplained physical symptoms in general. In view of the relative independence from depression and anxiety, classification and treatment of these symptoms and syndromes as "common mental disorders" does not seem fully appropriate.

[The effectiveness of psychodynamic therapy. A review using criteria of evidence-based medicine]

The existing studies on the effectiveness of psychodynamic therapy are reviewed. All studies published between 1960 and 2001 were collected. In the first part of this survey, the focus is on short-term psychodynamic therapy, the second part focuses on longer-term psychoanalytic and psychodynamic therapy. The studies are reviewed with regard to forms of disorders. The methodological quality of the studies is judged according to criteria of evidence-based medicine. These criteria themselves are also critically discussed. Although they vary concerning their methodological quality, the studies reveal evidence of the effectiveness of both short-term and long-term psychodynamic therapy. In a meta-analytic evaluation performed by the author, substantial effects were found for psychodynamic therapy of personality disorders, i.e. 1.13 (self-report measures) and 1.57 (observer-rated measures) for short-term psychodynamic therapy and 1.05 (self-report measures) and 2.11 (observer-rated measures) for longer term psychodynamic therapy. Although there is evidence of the effectiveness of psychodynamic therapy, further research of specific forms of psychodynamic therapy in specific disorders is necessary.

Outcomes research in mental health. Systematic review

BACKGROUND

Outcomes research involves the secondary analysis of data collected routinely by clinical services, in order to judge the effectiveness of interventions and policy initiatives. It permits the study of large databases of patients who are representative of 'real world' practice. However, there are potential problems with this observational design.

AIMS

To establish the strengths and limitations of outcomes research when applied in mental health.

METHOD

A systematic review was made of the application of outcomes research in mental health services research.

RESULTS

Nine examples of outcomes research in mental health services were found. Those that used insurance claims data have information on large numbers of patients but use surrogate outcomes that are of questionable value to clinicians and patients. Problems arise when attempting to adjust for important confounding variables using routinely collected claims data, making results difficult to interpret.

CONCLUSIONS

Outcomes research is unlikely to be a quick or cheap means of establishing evidence for the effectiveness of mental health practice and policy.

Psychotherapy for sexually abused girls: psychopathological outcome findings and patterns of change

BACKGROUND

Controversy exists about the efficacy of psychotherapy for the mental health problems of sexually abused children.

AIMS

To compare the relative efficacy of focused individual or group therapy in symptomatic sexually abused girls, and to monitor psychiatric symptoms for persistence or change.

METHOD

A multi-centre psychotherapy outcome study recruited 71 sexually abused girls aged 6-14 years who were randomly assigned to focused individual psychotherapy (up to 30 sessions) or psychoeducational group therapy (up to 18 sessions). Changes over the course of the study were monitored.

RESULTS

Both treatment groups showed a substantial reduction in psychopathological symptoms and an improvement in functioning, but with no evident difference between individual and group therapy. However, individual therapy led to a greater improvement in manifestations of post-traumatic stress disorder (PTSD).

CONCLUSIONS

The beneficial effects on PTSD support the use of individual therapy. However, the small sample size and lack of a control group limit conclusions about changes attributable to treatment.

EBM in practice: psychiatry

Psychiatry was one of the first medical specialties to use the tools of evidence-based medicine (EBM)--randomised controlled trials (RCTs), systematic reviews with meta-analyses--and as many treatment decisions in psychiatry are evidence-based as in general medicine. Psychiatrists have some reservations about the EBM approach because of perceived limitations in methodology of RCTs and systematic reviews; gaps in the evidence base; problems interpreting the available evidence; and neglect of individual patient uniqueness in quantitative research based on groups or populations. Research supports the value of psychotherapy and there are now a number of empirically validated efficacious psychotherapies for a range of disorders.