Helsinki Psychotherapy Study Research Articles

Individual Target Problems, Self-Observation and Change in Short-Term Psychodynamic Psychotherapy

The objective of this study was to analyze and illustrate the relationships between different expectations for psychotherapy, quality of self-observation and change in short-term psychodynamic psychotherapy. To conduct this, two patients from the Helsinki Psychotherapy Study were selected for qualitative analysis. The selection was based on the patients’ responses on the Target Complaints (TC) questionnaire, i.e., reasons for seeking psychotherapy, completed as part of the pre-treatment patient assessment. TC responses were classified as psychiatric symptoms or personality and functioning problems. The data for further analysis was selected for both patients from pre-treatment interviews and two follow-up interviews and analyzed in detail by dialogical sequence analysis (DSA), considering the quality of self-observation as a factor contributing to change. As a result, qualitative changes in relation to problematic experiences and development of self-observation appeared in the patient with mainly personality and functioning problems. In contrast, there were little respective changes in the experience of the patient whose target problems were limited to psychiatric symptoms. The results suggest that a patient’s exclusive identification of psychiatric symptoms as target problems may indicate poor suitability for short-term psychodynamic psychotherapy which emphasizes the developmental nature of psychotherapeutic change and the importance of self-observation as a factor of change.

Population attributable fraction (PAF) in repeated measures design: Childhood traumas as predictors of psychotherapy outcomes

IntroductionPopulation attributable fraction (PAF) represents the proportion of treatment failure, which could be avoided, if the individuals at high risk were similar to the individuals at low risk. The PAF, however, has not been available for repeated measures designs.A relatively prevalent and strong risk factor for many adulthood disorders, such as depression and anxiety, are adversities and traumas experienced in childhood. Little is, however, known of their implications for common treatments such as psychotherapy.ObjectivesTo develop PAF for repeated measures, and to provide a useful tool in various research fields to provide decision-makers results, which are easier to interpret.This study will examine the relative importance of different childhood traumas as predictors of psychotherapy outcome in a patient population with depressive and anxiety disorders.MethodsPAF was calculated using generalized linear mixed models and Bayesian predictive distributions.The data is based on 326 outpatients, randomized in one long-term and two short-term psychotherapies by the Helsinki Psychotherapy Study. Patients were assessed up to 10 times during a 5-year follow-up. A combination of psychiatric symptoms measured, is used as the outcome measure.ResultsThe repeated measures PAF will provide a useful aggregate measure over the follow-up time and over the patient population.ConclusionsThe repeated measures PAF will provide insight on the relative importance of the different domains of childhood traumas on therapy outcome. Associations of individual-level risk factors do not provide guidelines for policy decisions, which should acknowledge also prevalences of the risk factors in the patient population.Disclosure of interestThe authors have not supplied their declaration of competing interest.

Effectiveness of psychoanalysis and long-term psychodynamic psychotherapy 10 years after start of treatment

IntroductionThe evidence of potentially greater long-term benefits of psychoanalysis (PA) in comparison to long-term psychodynamic psychotherapy (LPP) is scarce.AimsThis study aimed to compare the effectiveness of PA and LPP on different aspects of functioning and wellbeing during a 10-year follow-up from the beginning of the treatments.MethodsAltogether 169 patients were included in the study: 41 patients self-selected for PA and 128 patients assigned to LPP in the Helsinki Psychotherapy Study. The eligible patients were 20–45 years of age and had a long-standing anxiety or mood disorder causing work dysfunction. Potential confounding factors were assessed at baseline and acknowledged in analyzing outcomes in personality (LPO, IIP-64, DSQ, SASB) and social functioning (SAS-SR, SOC, Perceived competence, LSS), psychiatric diagnoses (DSM-IV), symptoms (SCL-90, HDRS, HARS), work ability (SAS-work, WAI, PPF, GAF, work status), and remission, including the use of additional psychiatric treatment, measured 5 to 14 times during the 10-year follow-up.ResultsFrom the 5-year to the 7-year follow-up personality and social functioning improved significantly more in the PA than in the LPP group. In the domain of psychiatric symptoms and work ability practically no differences were found beyond the 5-year follow-up and at the final 10-year measurement, when psychiatric and work status was relatively good in both treatment groups.ConclusionsPA may give additional benefits especially when personality-related long-term aims are essential and less intensive treatments are not considered to be sufficient.Disclosure of interestThe authors have not supplied their declaration of competing interest.

Patients' pre-treatment interpersonal problems as predictors of therapeutic alliance in long-term psychodynamic psychotherapy

Information on how the patient's interpersonal problems predict alliance development during long-term therapy is lacking. The aim of this study was to explore how the patient's pre-treatment interpersonal problems predict the development of alliance in long-term psychotherapy. Altogether 128 adult outpatients experiencing mood or anxiety disorder were assigned to long-term psychodynamic psychotherapy in the Helsinki Psychotherapy Study. The Inventory of Interpersonal Problems (IIP) total score and the eight octant scores, assessed at baseline, were used as predictors. The trajectories of change in patient- and therapist-rated Working Alliance Inventory (WAI) were used as outcome measures at 7, 12, and 36 months of follow-up after baseline. Study of the changes by time showed that the patient-rated alliance was significantly improved by the 36-month follow-up, i.e. the most usual end-point of therapy, in persons with higher pre-treatment level of the IIP total score. Low total IIP score and low to moderate level of hostile type problems showed no slope of improvement of patient-rated alliance during follow-up. The therapist-rated alliance showed a similar course as the patient-rated alliance with the exception of a faster improvement for higher IIP scores. In conclusion, a higher level of patients' interpersonal problems predicted favorable alliance development.

The outcome of short- and long-term psychotherapy 10 years after start of treatment.

Empirical evidence on whether patients' mental health and functioning will be more improved after long-term than short-term therapy is scarce. We addressed this question in a clinical trial with a long follow-up. In the Helsinki Psychotherapy Study, 326 out-patients with mood or anxiety disorder were randomly assigned to long-term psychodynamic psychotherapy (LPP), short-term psychodynamic psychotherapy (SPP) or solution-focused therapy (SFT) and were followed for 10 years. The outcome measures were psychiatric symptoms, work ability, personality and social functioning, need for treatment, and remission. At the end of the follow-up, altogether 74% of the patients were free from clinically elevated psychiatric symptoms. Compared with SPP, LPP showed greater reductions in symptoms, greater improvement in work ability and higher remission rates. A similar difference in symptoms and work ability was observed in comparison with SFT after adjustment for violations of treatment standards. No notable differences in effectiveness between SFT and SPP were observed. The prevalence of auxiliary treatment was relatively high, 47% in SFT, 58% in SPP and 33% in LPP, and, accordingly, the remission rates for general symptoms were 55, 45 and 62%, respectively. After 10 years of follow-up, the benefits of LPP in comparison with the short-term therapies are rather small, though significant in symptoms and work ability, possibly due to more frequent use of auxiliary therapy in the short-term therapy groups. Further studies should focus on the choice of optimal length of therapy and the selection of factors predicting outcome of short- v. long-term therapy.

The cost-effectiveness of short-term and long-term psychotherapy in the treatment of depressive and anxiety disorders during a 5-year follow-up

Both short-term and long-term psychotherapies are used extensively in treating different mental disorders, but there have been practically no attempts to compare their cost-effectiveness. The aim of this study, which is part of the Helsinki Psychotherapy Study, is to assess the cost-effectiveness of two short-term therapies compared to that of a long-term therapy. In this study 326 outpatients suffering from mood or anxiety disorder were randomized to solution-focused therapy (SFT), short-term psychodynamic psychotherapy (SPP) or to long-term psychodynamic psychotherapy (LPP). Psychiatric symptoms and working ability were assessed at baseline and then 4–9 times during a 5-year follow-up using eight widely used measures including e.g. Beck Depression Inventory (BDI), Hamilton Depression Rating Scale (HDRS), Symptom Check List, anxiety scale (SCL-90-Anx), Hamilton Anxiety Rating Scale (HARS), Symptom Check List, Global Severity Index (SCL-90-GSI), and the Work-subscale (SAS-Work) of the Social Adjustment Scale (SAS-SR). Both direct and indirect costs were measured. During the 5-year follow-up period statistically significant improvements were observed in all health indicators in all therapy groups. At first the recovery was faster in the short-term therapy groups than in the LPP group, but taking the whole follow-up period into account, the effectiveness of the LPP was somewhat greater than that of the short-term therapies. Especially the direct costs were, however, much higher in the LPP group than in the short-term therapy groups. Thus the long-term therapy can hardly be regarded as cost-effective compared to short-term therapies when patients are randomized to the therapy groups.

Randomized trial on the effectiveness of long- and short-term psychotherapy on psychosocial functioning and quality of life during a 5-year follow-up

Knowledge is incomplete on whether long-term psychotherapy is more effective than short-term therapy in treating mood and anxiety disorder, when measured by improvements in psychosocial functioning and life quality. In the Helsinki Psychotherapy Study, 326 outpatients with mood or anxiety disorder were randomized to solution-focused therapy (SFT), short-term psychodynamic psychotherapy (SPP), or long-term psychodynamic psychotherapy (LPP), and followed up for 5 years from the start of treatment. The outcome measures comprised 4 questionnaires on psychosocial functioning, assessing global social functioning (Social Adjustment Scale (SAS-SR), sense of coherence (Sense of Coherence Scale (SOC)), perceived competence (Self-Performance Survey), dispositional optimism (Life Orientation Test (LOT)), and 1 questionnaire assessing quality of life (Life Situation Survey (LSS)). Short-term therapies improved psychosocial functioning and quality of life more than LPP during the first year. The only exceptions were LOT and perceived competence, which did not differ between SPP and LPP. Later in the follow-up, SOC and perceived competence showed significantly more improvement in LPP than in the short-term therapy groups. No direct differences between SFT and SPP were noted. Short-term therapy has consistently more short-term effects on psychosocial functioning and quality of life than LPP, whereas LPP has some additional long-term benefits on psychosocial functioning.

The effectiveness of short- and long-term psychotherapy on personality functioning during a 5-year follow-up

BackgroundOnly few randomized trials comparing sustained effects of short- and long-term psychotherapies in personality functioning are available. In this study we compared the effects of two short-term therapies and long-term psychodynamic psychotherapy on patients’ personality functioning during a 5-year follow-up. MethodsAltogether 326 patients of the Helsinki Psychotherapy Study, with anxiety or mood disorder, were randomly assigned to either short-term psychotherapy of about six months (solution-focused therapy (SFT, n=97) or short-term psychodynamic psychotherapy (SPP, n=101)), or to long-term psychodynamic psychotherapy (LPP, n=128), lasting on average three years. Outcomes in personality functioning (i.e., self-concept, defense style, interpersonal problems, and level of personality organization) were assessed five to seven times using, respectively, questionnaires (SASB, DSQ, IIP) and interview (LPO) during the 5-year follow-up from randomization. ResultsPersonality functioning improved in all therapy groups. Both short-term therapies fared better than LPP during the first year of follow-up, by faster improvement in self-concept and decrease in immature defense style. SFT also showed more early reduction of interpersonal problems. However, LPP thereafter showed larger and more sustained benefits than SFT and SPP, through greater changes in self-concept. Additionally, LPP outperformed SFT at the end of the follow-up in IIP and LPO, after adjustment for auxiliary treatment. No differences were noted between the short-term therapies at any measurement point. LimitationsAuxiliary treatment was used relatively widely which limits generalization to exclusive use of short- or long-term therapy. ConclusionsLPP seems to be somewhat more effective than short-term therapies in facilitating longterm changes in personality functioning.

Intelligence as a predictor of outcome in short- and long-term psychotherapy

Intelligence has been suggested as a suitability factor for short-term therapy whereas its possible effect on short-term versus long-term therapy still is unknown. The aim of this study was to compare the prediction of intelligence on the level of psychiatric symptoms and psychosocial functioning in psychotherapies of different lengths. A total of 251 outpatients from the Helsinki Psychotherapy Study, aged 20–46 years, and suffering from mood or anxiety disorders were allocated to two long-term and two short-term therapies. Intelligence was assessed at baseline with the Wechsler Adult Intelligence Scale (WAIS-R). Psychiatric symptoms and psychosocial functioning were assessed 5–10 times during a 5-year follow-up using two primary symptom measures (HDRS and HARS) and one primary measure of psychosocial functioning (GAF). Short-term therapy was more effective than long-term therapy during the first year of follow-up. During the second to fourth follow-up year no differences between short- and long-term therapies or the intelligence groups were found. At the fifth follow-up year, however, long-term psychotherapy showed a statistically significantly larger change in all three primary measures compared to short-term therapy among those with higher intelligence. No differences between therapy groups were noted in those with lower intelligence. People with higher intelligence may benefit more from long-term than from short-term psychotherapy. These findings should be confirmed.

Self-reported immature defense style as a predictor of outcome in short-term and long-term psychotherapy.

ObjectiveIdentification of pretreatment patient characteristics predictive of psychotherapy outcome could help to guide treatment choices. This study evaluates patients' initial level of immature defense style as a predictor of the outcome of short-term versus long-term psychotherapy.MethodIn the Helsinki Psychotherapy Study, 326 adult outpatients with mood or anxiety disorder were randomized to individual short-term (psychodynamic or solution-focused) or long-term (psychodynamic) psychotherapy. Their defense style was assessed at baseline using the 88-item Defense Style Questionnaire and classified as low or high around the median value of the respective score. Both specific (Beck Depression Inventory [BDI], Hamilton Depression Rating Scale [HDRS], Symptom Check List Anxiety Scale [SCL-90-Anx], Hamilton Anxiety Rating Scale [HARS]) and global (Symptom Check List Global Severity Index [SCL-90-GSI], Global Assessment of Functioning Scale [GAF]) psychiatric symptoms were measured at baseline and 3–7 times during a 3-year follow-up.ResultsPatients with high use of immature defense style experienced greater symptom reduction in long-term than in short-term psychotherapy by the end of the 3-year follow-up (50% vs. 34%). Patients with low use of immature defense style experienced faster symptom reduction in short-term than in long-term psychotherapy during the first year of follow-up (34% vs. 19%).ConclusionKnowledge of patients' initial level of immature defense style may potentially be utilized in tailoring treatments. Further research on defense styles as outcome predictors in psychotherapies of different types is needed.

Social support as a predictor of the outcome of depressive and anxiety disorder in short-term and long-term psychotherapy

Social support is known to be important for well-being of individuals, but it is not clear how it predicts psychotherapy outcome in patients suffering from depressive or anxiety disorders. The aim of the present study was to study the prediction of social support on the outcome of short-term and long-term psychotherapy. In the Helsinki Psychotherapy Study, 326 psychiatric outpatients, aged 20–46 years, and suffering from depressive or anxiety disorders, were randomly assigned to short-term psychotherapy (short-term psychodynamic or solution-focused) or long-term psychodynamic psychotherapy. The level of social support at baseline was assessed using the Brief Inventory of Social Support and Integration (BISSI). Psychiatric symptoms were assessed with the Symptom Check List, Global Severity Index (SCL-90-GSI) at baseline and four times during a 3-year follow-up. Patients with a high level of social support before treatment benefitted more from long-term than short-term therapy at the 3-year follow-up, whereas patients with a low level of social support experienced no such benefit.Pretreatment social support seems to predict differentially short- and long-term psychotherapy and thus needs to be acknowledged when evaluating patient's resources and treatment options. More research is needed to verify these findings.

Confounding and missing data in cost-effectiveness analysis: comparing different methods

IntroductionCommon approaches in cost-effectiveness analyses do not adjust for confounders. In nonrandomized studies this can result in biased results. Parametric models such as regression models are commonly applied to adjust for confounding, but there are several issues which need to be accounted for. The distribution of costs is often skewed and there can be a considerable proportion of observations of zero costs, which cannot be well handled using simple linear models. Associations between costs and effectiveness cannot usually be explained using observed background information alone, which also requires special attention in parametric modeling. Furthermore, in longitudinal panel data, missing observations are a growing problem also with nonparametric methods when cumulative outcome measures are used.MethodsWe compare two methods, which can handle the aforementioned issues, in addition to the standard unadjusted bootstrap techniques for assessing cost-effectiveness in the Helsinki Psychotherapy Study based on five repeated measurements of the Global Severity Index (SCL-90-GSI) and direct costs during one year of follow-up in two groups defined by the Defence Style Questionnaire (DSQ) at baseline. The first method models cumulative costs and effectiveness using generalized linear models, multiple imputation and bootstrap techniques. The second method deals with repeated measurement data directly using a hierarchical two-part logistic and gamma regression model for costs, a hierarchical linear model for effectiveness, and Bayesian inference.ResultsThe adjustment for confounders mitigated the differences of the DSQ groups. Our method, based on Bayesian inference, revealed the unexplained association of costs and effectiveness. Furthermore, the method also demonstrated strong heteroscedasticity in positive costs.ConclusionsConfounders should be accounted for in cost-effectiveness analyses, if the comparison groups are not randomized.JEL classificationC1; C3; I1

Estimating efficacy in the presence of non-ignorable non-trial interventions in the Helsinki Psychotherapy Study

In a randomised clinical trial with a longitudinal outcome, analyses of the efficacy of the study treatments may be complicated by both non-trial interventions, which have not been administered by the researcher, and sparsely measured outcome values. The delay between the change in outcome and the starting of the non-trial intervention may be much shorter than the time intervals between the actual measurements. We propose a model that accounts for the possible dynamic interdependence between the longitudinal outcome and time-to-event data. The model is based on discretising time into short intervals. This results in a missing data problem, which we tackle using Bayesian inference and data augmentation. The method is based on the assumption that decisions to initiate non-trial interventions are not confounded by unobservable factors. The Helsinki Psychotherapy Study data are used as an illustration. Different psychotherapies were compared, and possible episodes of psychotropic medication were viewed as non-trial interventions. Simulation studies suggest that our method provides reasonable estimates of the effects of both the study treatment and the non-trial intervention also showing some robustness against possible latent background factors. An application of marginal structural modelling, however, appeared to underestimate the differences between the treatments.

955 – Long-term effectiveness of long- and short-term psychotherapy in the treatment of depressive and anxiety disorders

Introduction Little is known about long-term effects of psychotherapy on depressive or anxiety disorders. Aims To compare the effectiveness of three psychotherapies of different length in a clinical trial with a 5-year follow-up. Methods In the Helsinki Psychotherapy Study, 326 outpatients with mood or anxiety disorder were randomly assigned to longterm psychodynamic psychotherapy (LPP), short-term psychodynamic psychotherapy (SPP), and solution-focused therapy (SFT), and were followed up for 5 years from start of treatment. Depressive, anxiety and general psychiatric symptoms (BDI, SCL-90-Anx, and SCL-90-GSI), working ability (WAI), and recovery (based on changes in psychiatric symptoms and use of auxiliary treatment) were used as outcome measures. Results For patients with depressive disorder LPP was more effective than SPP or SFT in reducing symptoms, improving work ability and leading to recovery during the 3 last years of follow-up. For patients with anxiety disorder effectiveness of LPP was less pronounced with no differences between short-term and long-term therapy in recovery from anxiety symptoms. No differences were found between the effectiveness of the short-term therapies. Conclusions Long-term psychotherapy is more effective than short-term therapy during a long follow-up especially in the treatment of depressive disorder. More research especially considering different anxiety disorders is still needed.

The Effectiveness of Solution-Focused Therapy and Short- and Long-Term Psychodynamic Psychotherapy on Self-Concept During a 3-Year Follow-Up

This study compares the effectiveness of solution-focused therapy (SFT) and short- and long-term psychodynamic psychotherapy (SPP and LPP) on self-concept during a 3-year follow-up. Altogether, 326 patients with mood or anxiety disorder were randomized to SFT, SPP, and LPP in the Helsinki Psychotherapy Study. Outcome was assessed using the Structural Analysis of Social Behavior questionnaire at baseline and 7, 12, 24, and 36 months after. Overall, during the first year of follow-up, self-concept improved more in both SFT and SPP than in LPP, indicated by the primary outcome indicators self-directed affiliation (AF) and self-directed autonomy, as well as by most of the eight secondary cluster scores. After the 3-year follow-up, LPP was more effective than SFT in AF and in the cluster scores self-affirm, self-blame, and self-neglect, whereas no difference was noted between LPP and SPP. Long duration and psychodynamic orientation of therapy may be beneficial for self-concept improvement.

Psychological predictors of the recovery from mood or anxiety disorder in short-term and long-term psychotherapy during a 3-year follow-up

Choice of optimal treatment length for psychiatric patients requires knowledge about the patients' pre-treatment suitability. This study compares the prediction of seven psychological suitability measures on changes in psychiatric symptoms in short- and long-term psychotherapy over a 3-year follow-up. The psychological suitability of 326 outpatients from the Helsinki Psychotherapy Study, aged 20–46 years, and suffering from mood or anxiety disorders, was assessed at baseline using the Suitability for Psychotherapy Scale (SPS) before randomly assigning them to solution-focused therapy, short-term or long-term psychodynamic psychotherapy. Psychiatric symptoms (Symptom Checklist-90 Global Severity Index) were assessed at baseline and seven times during follow-up. Three patient groups with different prognosis were found when a cumulative SPS score, summing up the values of the seven single suitability measures, was used to predict symptom development: patients with more good (4 or more) than poor values benefited more from short-term therapy, patients with more poor (4–6) than good values benefited more from long-term therapy, and patients with all seven values poor failed to benefit from either short- or long-term therapy. The SPS can apparently be applied before the start of treatment to predict the amount of therapy patients need to recover, although its suitability in therapies of different types needs to be confirmed.

Randomized trial on the effectiveness of long- and short-term psychotherapy on psychiatric symptoms and working ability during a 5-year follow-up

Background: The information on whether long-term psychotherapy is superior in comparison with short-term therapies during a long time-perspective in the treatment of mood and anxiety disorder is incomplete. Aims: The present study addresses this question in a clinical trial with an exceptionally long follow-up. Methods: In the Helsinki Psychotherapy Study, 326 outpatients with mood or anxiety disorder were randomly assigned to long-term psychodynamic psychotherapy and two types of short-term psychotherapy (short-term psychodynamic psychotherapy and solution-focused therapy) and were followed up for 5 years from the start of treatment. The outcome measures were psychiatric symptoms measured by Beck Depression Inventory (BDI), Hamilton Depression Rating Scale (HDRS), Symptom Check List, anxiety scale (SCL-90-Anx), Hamilton Anxiety Rating Scale (HARS) and Symptom Check List, Global Severity Index (SCL-90-GSI), and working ability measured by the Work Ability Index (WAI), the Work-subscale (SAS-Work) of the Social Adjustment Scale (SAS-SR) and the Perceived Psychological Functioning Scale (PPF). Furthermore, remission variables based on changes in psychiatric symptoms and use of auxiliary treatment, were used. Results: After the 5-year follow-up, the rate of recovery from psychiatric symptoms and the work ability improvement rate remained higher in the long-term therapy group, whereas no differences in the effectiveness of the two short-term therapies of different modalities were found. Conclusions: Long-term psychotherapy is more effective than short-term therapy during a long follow-up, suggesting the need for a careful evaluation of suitability to short-term therapy. More research on the long-term effects of psychotherapy in large-scale studies is still needed, however.

Prediction of the outcome of short- and long-term psychotherapy based on socio-demographic factors

Socio-demographic factors predict the outcome of short-term psychotherapy (STT) in the treatment of mood and anxiety disorders, but information on the prediction for long long-term therapy (LPP) is lacking. We aimed to compare the prediction of changes in psychiatric symptoms afforded by socio-demographic factors across two treatment conditions, short- versus long-term psychotherapy. In the Helsinki Psychotherapy Study, 326 outpatients with mood or anxiety disorders, aged 20-46 years, were randomly assigned to STT or LPP. Socio-demographic factors (i.e. age, gender, education, employment status, marital status, and living arrangement) were self-reported. Psychiatric symptoms were measured by the Symptom Check List, Global Severity Index (SCL-90-GSI) and Anxiety scale (SCL-90-Anx), and the Beck Depression Inventory (BDI) at baseline and seven times during a three-year follow-up period. Socio-demographic factors were found to predict symptom development during follow-up irrespective of the baseline symptom level. Patients in a relatively good position, i.e. married and highly educated patients benefited from STT, whereas patients in less advantaged positions, i.e. homemakers, lone parents, and divorced patients needed LPP or did not benefit from either therapy. In several categories of socio-demographic factors, the extent to which a patient's background predicted the outcome of the psychotherapy varied according to whether general, anxiety or depressive symptoms were studied. We were unable to assess widows and pensioners. For ethical reasons, a no-treatment control group with a long follow-up could not be included in the study design. Socio-demographic factors may need to be considered in the selection of patients for short- and long-term therapy.

Suitability for Psychotherapy Scale (SPS) and its reliability, validity, and prediction

To present an interview-based 7-item Suitability for Psychotherapy Scale (SPS) created to evaluate suitability for short- and long-term therapy, and to assess its reliability, validity, and prediction. Reliability of the SPS was evaluated by measuring both repeatability and agreement (cross-sectional design). Validity of the SPS was evaluated by measuring both criterion and discriminating validity (cross-sectional design). Prediction of the SPS was evaluated using a cohort study design. Suitability of 326 psychiatric outpatients from the Helsinki Psychotherapy Study was assessed at baseline with the SPS, and a summary score of the seven items was formed. Reliability of the SPS was evaluated using kappa coefficients and validity using linear models. The ability of the SPS to predict changes in symptoms (SCL-90-GSI) during a 1-year follow-up was measured. The analysis of validity and prediction of SPS were based on data of all 326 patients and analysis of reliability of SPS on a sample of 28 patients. Both the repeatability of the interviewers' assessments over 3 years and agreement between interviewers and reference were fair or good. An association of the SPS with personality functions but not with psychiatric symptoms supported criterion and discriminating validity of the SPS. The SPS also significantly predicted changes in symptoms during follow-up. The SPS appeared to be a valid and reliable method for assessing pre-treatment suitability, with good prediction of psychotherapy outcome.

P-1153 - The effectiveness of short- and long-term psychotherapy during a 7-year follow-up

Introduction The majority of studies on the effectiveness of psychotherapy have reported results for relatively short follow-up times. Aims In this study the effectiveness of short- and long-term psychotherapy was compared during a very long follow-up. Methods A total of 326 psychiatric outpatients with mood or anxiety disorder were randomly assigned to solution-focused therapy (12 sessions), short-term psychodynamic (20 sessions) and long-term psychodynamic psychotherapy (240 sessions) in Helsinki Psychotherapy Study. The patients were followed from start of treatment and assessed 11 times during a 7-year follow-up. Symptom Check List (anxiety, depression, and general symptom scale), Work-subscale of the Social Adjustment Scale, and use of auxiliary treatment (psychotherapy, psychotropic medication, and psychiatric hospitalization) were used as outcome measures. Results A reduction in psychiatric symptoms and improvement in work ability and functional capacity was noted in all treatment groups. The short-term therapies were more effective than long-term psychotherapy during the first year, whereas the long-term therapy was more effective after 3 years of follow-up. No significant differences were observed between long- and short-term therapies during the 4 last years of follow-up.A total of 80% of the patients in the short-term therapy groups and 60% in the long-term therapy group used auxiliary treatment. Conclusions Short-term psychotherapy gives faster benefits than long-term psychotherapy, but in the long run no notable differences in symptoms or working ability are seen. Considerably auxiliary treatments are taken after the end of the intervention implying further need of treatment. These findings should be repeated in other populations.