Performance of a measure to assess distress in bipolar disorder

Bipolar disorder is a condition that causes distress even for euthymic patients, having an impact on functional capabilities and quality of life. Personal and social variables are potential sources of distress. Yet, there is a lack of measures to identify specific distress in bipolar disorder. This study describes the development and evaluation of a brief measure for assessing distress in patients with bipolar disorder. We also identify associations with related constructs such as functioning, stigma, and personal beliefs regarding mental illness.

We used a sample of 101 euthymic bipolar outpatients. Psychological assessment consisted of the Young Mania Rating Scale (YMRS) and the Hamilton Depression Scale (HAM-D) to establish euthymia. Distress was assessed with Distress on Bipolar Patients-Short (DISBIP-S); associated variables were assessed with the Functioning Assessment Short Scale (FAST), the Internalized Stigma of Mental Illness (ISMI), and the Personal Beliefs about Illness Questionnaire (PBIQ).

The DISBIP-S has strong internal consistency (Cronbach's alpha=0.90), and medium-high correlation coefficients with the time since last relapse (r=-0.401), predominant polarity (r=0.309), HDRS (r=-0.644), FAST (r=0.453), ISMI (r=0.789), and PBIQ (r=-0.796). Taken together, the scores on the ISMI, and PBIQ and the time since last relapse together explain 69.2% of the variability in distress.

The DISBIP-S can be used as a first step to develop interventions aimed at dealing with problematic personal beliefs and interpersonal sources of distress. Reducing distress experienced by bipolar disorder patients could help improve their quality of life and daily functioning.