8Ĭomparison Between OABD and Early-Onset Bipolar Disorder Approximately 70% of individuals with OABD are women. 8 A diagnosis of BD is noted in approximately 3% of older nursing home residents and 9.7% of older chronically institutionalized individuals. Among individuals who live in residential psychiatric program for older adults, the prevalence of bipolar disorder is approximately 17.4%. 8 Approximately 8% to 10% of geriatric inpatient admissions and 6% of geriatric psychiatry outpatient visits include individuals with OABD. 3 Among older adults who go to the emergency room for a psychiatric evaluation, BD has been noted in 17% of cases. 8,9 New-onset mania later in life occurs in approximately 10% of individuals with OABD, and it is often associated with neurovascular disease.
7 Among older adults who are diagnosed with a mood disorder, 10% to 25% have BD. OABD has a point prevalence of 0.1% to 0.5% and a lifetime prevalence of 0.5% to 1.0%. 4Īccording to the International Society for Bipolar Disorders (ISBD) Task Force, “older age bipolar disorder” (OABD) is defined as BD occurring in individuals ≥ 50 years of age.5One quarter of all cases of BD occur among individuals ≥ 60 years of age and > 10% of the cases occurred among individuals ≥ 70 years of age. 2,3 It has been observed that between 19, the relative frequency of late-onset bipolar disorder increased from 1% to 11%. Although BD is not as common among older adults as it is among younger adults, available evidence indicates that the total number of older adults with BD is expected to increase significantly over the next few decades. Individuals are diagnosed with BD-II if they experience at least 1 hypomanic episode and at least 1 major depressive episode without any manic episodes.
A diagnosis of BD-I is established if an individual experiences at least 1 manic episode with additional major depressive and/or hypomanic episodes.
1 In the DSM-5, there are 2 subtypes of BD: bipolar I disorder (BD-I) and bipolar II disorder (BD-II). The DSM-5 describes bipolar disorder (BD) as a condition that is characterized by recurrent and/or cyclical episodes of mania or hypomania and depression.
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