Characteristics associated with inpatient versus outpatient status in older adults with bipolar disorder

This is an exploratory analysis of ambulatory and inpatient services utilization by older persons with type I bipolar disorder experiencing elevated mood. The association between type of treatment setting and the person's characteristics is explored within a framework that focuses upon predisposing, enhancing, and need characteristics.

Baseline assessments were conducted with the first 51 inpatients and 49 outpatients 60 years of age and older, meeting criteria for type I bipolar disorder, manic, hypomanic, or mixed episode enrolled in the geriatric bipolar disorder study (GERI-BD) study. We compared participants recruited from inpatient versus outpatient settings in regard to the patients' predisposing, enabling, and need characteristics.

Being treated in an inpatient rather than an outpatient setting was associated with the predisposing characteristic of being non-Hispanic caucasian (odds ratio [OR]: 0.1; P = .005) and past history of treatment with first-generation antipsychotics (OR: 6.5; P < .001), and the need characteristic reflected in having psychotic symptoms present in the current episode (OR: 126.08; P < .001).

Ethnicity, past pharmacologic treatment, and current symptom severity are closely associated with treatment in inpatient settings. Clinicians and researchers should investigate whether closer monitoring of persons with well-validated predisposing and need characteristics can lead to their being treated in less costly but equally effective ambulatory rather than inpatient settings.