Improving functional outcome in bipolar disorder: A pilot study on metacognitive training.

BACKGROUND: Effective group psychological interventions in bipolar disorder are rare. In this study, we present "metacognitive training (MCT) for bipolar disorder"-an adaption of a group intervention that has proven effective in other severe psychiatric disorders. MCT is a structured, interactive approach that addresses cognitive biases, social cognition, and self-esteem. In this pilot study, we investigated psychosocial functioning as primary outcome measure, as well as the feasibility of MCT and its acceptance among bipolar patients. METHODS: Thirty-four outpatients with bipolar disorder were recruited. Inclusion criteria were euthymia and psychosocial functioning with a score >11 assessed by the Functional Assessment Short Test. The subjects received eight weekly MCT sessions. Before and after the intervention, psychosocial functioning, quality of life (QoL), and patient views were assessed. RESULTS: Patients improved significantly in global psychosocial functioning, with a large effect size from baseline to post-treatment. Over the intervention period, patient QoL improved significantly in terms of their physical health, however not for other QoL subdomains. Treatment adherence was 80%, and patients' appraisal of the training was positive. LIMITATIONS: As this study lacks a control group, it is not possible to ascertain whether the positive treatment effects are attributable to MCT. Additionally, it is unclear whether gains in psychosocial functioning would have been maintained long term. CONCLUSIONS: This pilot trial conclusively shows that MCT is feasible and provides preliminary evidence for both the acceptance and efficacy of MCT. Further studies with larger samples and control condition will be necessary to build on these findings.

Behavioral measures and self-report of impulsivity in bipolar disorder: no association between Stroop test and Barratt Impulsiveness Scale.

BACKGROUND: Impulsivity as a tendency to act quickly without considering future consequences has been proposed as a dimensional factor in bipolar disorder. It can be measured using behavioral tasks and self-report questionnaires. Previous findings revealed patients to show worse performance on at least one behavioral measure of impulsivity. Additionally, self-reported impulsivity seems to be higher among bipolar patients, both parameters being possibly associated with a more severe course of illness. In this study, our primary aim was to investigate the relationship between these two constructs of impulsivity among bipolar patients. METHODS: A total of 40 euthymic patients with bipolar disorder (21 female, 22 Bipolar I) and 30 healthy controls were recruited for comprehensive neuropsychological assessment. To assess inhibition control as a behavioral measure of impulsivity, the Stroop Color and Word Test (Stroop) was used. Additionally, both groups completed the Barratt Impulsiveness Scale (BIS) as a self-report of impulsivity. To compare the groups' performance on the Stroop and ratings on the BIS, the non-parametric Mann-Whitney U test was used. Within the bipolar group, we additionally examined the possibility of an association between Stroop performance and BIS total scores using Pearson's Correlation r. RESULTS: Patients and controls differed significantly on the Stroop and BIS, with patients performing worse on the Stroop and scoring higher on the BIS. However, there was no association between the Stroop and BIS within the bipolar group. As an exploratory analysis, a positive correlation between Stroop performance and number of episodes was found. Further, we detected a statistical trend in the direction of poorer Stroop performance among patients treated with polypharmacy. CONCLUSIONS: Both difficulties with behavioral inhibition and self-reported impulsivity were observed to be higher in bipolar patients than controls in the current study. However, within the patient group we did not observe an association between patients' behavioral performance and self-report. This indicates that the parameters likely constitute distinct, dimensional factors of bipolar disorder. In future research, studies with larger samples should investigate which of the two markers constitutes the better marker for the illness and is more suitable to differentiate the most severe patients.