Cognitive and psychosocial functioning in bipolar disorder with and without psychosis during early remission from an acute mood episode: a comparative longitudinal study.

BACKGROUND: The current investigation aimed to extend previous findings, which linked psychosis in bipolar disorder (BD) to cognitive impairment during hospital discharge and readmission, by examining the recovery of patients with psychosis who were not re-hospitalized. The study compared mood, cognitive and functional outcomes in patients who had, versus had not, experienced psychosis during a recent psychiatric hospitalization. The hypothesis was that patients admitted to the hospital with psychosis would exhibit more residual symptoms, greater cognitive deficits, and lower psychosocial functioning than patients who presented to care without psychosis. Group differences were expected to emerge both at the time of hospital discharge and at a 3-month follow up.
METHOD: Fifty-five participants (ages 18-59, 25 women, 20 with psychosis) with BD I disorder completed both assessments, which included a clinical and diagnostic interview, functional evaluation, and the administration of mood measures and a neuropsychological battery.
RESULTS: The groups were comparable with respect to illness history (e.g., number of previous hospitalizations, age of onset, employment). At discharge and follow-up, the group with psychosis exhibited more mood symptoms, obtained lower GAF scores, and performed more poorly on measures of memory and executive functioning. At follow-up, participants with psychosis exhibited poorer psychosocial adaptation. LIMITATIONS: It is possible that some of the observed group differences in cognitive functioning emerged due to differences in medication efficacy or side effects.
CONCLUSION: The results of this study support the hypothesis that psychosis in BD predicts limited recovery during early remission from mood disturbance, regardless of illness history.