High risk of silent stroke in older bipolar patients with typical-onset age

Outpatient Management of Bipolar Disorder in Older Adults

PURPOSEOF REVIEW

Old age bipolar disorder (OABD), increasingly common as the population ages, presents unique diagnostic and treatment challenges. This selective review focuses on issues especially relevant to outpatient management.

RECENT FINDINGS

People with OABD may have similar frequency and severity of mood episodes compared to younger adults. Depression predominates, and mixed symptoms in both depressive and manic episodes are common. Comorbidity and excess mortality are high, with a particular bidirectional association with cerebrovascular disease. Lithium may outperform valproic acid and second-generation antipsychotics in efficacy. Tolerability and long-term safety can be improved with relatively lower target drug therapeutic levels. Outpatient clinicians treating OABD should take an active role in the recognition and management of medical comorbidities. A careful history and examination might reveal subtle signs of bipolar disorder or mixed features and change treatment. A primary target for treatment is to reduce polypharmacy when appropriate. Further trials are needed to make specific and clear recommendations in OABD.

Brain health and mental health: Common vascular risk factors and practical implications

The pandemic dramatized the close links among cognitive, mental, and social health; a change in one reflects others. This realization offers the opportunity to bridge the artificial separation of brain and mental health, as brain disorders have behavioral consequences and behavioral disorders affect the brain. The leading causes of mortality and disability, namely stroke, heart disease, and dementia, share the same risk and protective factors. It is emerging that bipolar disorders, obsessive compulsive disorders, and some depressions share these risk factors, allowing their joint prevention through a holistic life span approach. We need to learn to focus on the whole patient, not simply on a dysfunctional organ or behavior to mitigate or prevent the major neurological and mental disorders by fostering an integrated approach to brain and mental health and addressing the common, treatable risk factors.

Physical health comorbidities in older adults with bipolar disorder: A systematic review

OBJECTIVE

To ascertain the prevalence and predictors of physical health comorbidities in older adults with bipolar disorder.

METHODS

The authors conducted a systematic review and narrative synthesis of peer-reviewed journal articles reporting on physical health comorbidities in older adults (aged ≥50) with a diagnosis of bipolar disorder. The Mixed Methods Appraisal Tool (MMAT) assessed study quality.

RESULTS

23 papers reporting on 19 studies met the inclusion criteria. The literature on diabetes, obesity and renal disease was inconclusive. There was some tentative evidence to higher rates of cardiovascular disease and some forms of cancer in older adults with bipolar disorder in comparison to the general population, but this requires further investigation. We identified no studies looking at oral health.

LIMITATIONS

The quality ratings of the identified research were generally low. Very few studies included a comparison sample from the general population or controlled for key covariates in their analysis.

CONCLUSION

Existing literature provides tentative evidence that some physical health comorbidities are elevated in older adults with bipolar disorder. Clinicians should consider interventions that improve the physical health of this group, alongside the chronic mental health difficulties they experience.

Bipolar disorder and the risk for stroke incidence and mortality: a meta-analysis

OBJECTIVE

Bipolar disorder (BD) may be associated with an increased risk of stroke, but to date, the results of the studies are still controversial. This study aimed to assess the association of BD with stroke incidence and mortality by a meta-analysis.

METHOD

PubMed, EMBASE, the Cochrane library databases, and Web of Science databases were searched from inception to July 2020. We regarded stroke as a composite endpoint. The pooled hazard ratio (HRs) of 95% confidence interval (Cls) was calculated. Subgroup and sensitivity analyses were performed to assess the potential sources of heterogeneity of the pooled estimation.

RESULTS

A total of 7 studies involving a total of 13,305,007 participants were included in this meta-analysis. Pooled analysis showed participants with BD experienced a significantly increased risk of both stroke incidence (combined HR, 1.43; 95% CI, 1.24-1.66; p = 0.000) and stroke mortality (combined HR, 1.54; 95% CI, 1.09-2.18; p = 0.013) compared to participants without BD. In addition, the pooled estimate of multivariate HRs of stroke incidence and mortality were 1.35 (95% CI: 1.26-1.45); 2.30 ( 95% CI: 1.37-3.85) among men and 1.43 (95% CI:1.27-1.60); 2.08 (95% CI:1.60-2.71) among women respectively.

CONCLUSIONS

This meta-analysis suggests that BD may modestly increase the risk of both stroke incidence and mortality. Extensive clinical observational studies should be conducted in the future to explore whether BD is a potentially modifiable risk factor for stroke.

Call to action regarding the vascular-bipolar link: A report from the Vascular Task Force of the International Society for Bipolar Disorders

OBJECTIVES

The association of bipolar disorder with early and excessive cardiovascular disease was identified over a century ago. Nonetheless, the vascular-bipolar link remains underrecognized, particularly with regard to how this link can contribute to our understanding of pathogenesis and treatment.

METHODS

An international group of experts completed a selective review of the literature, distilling core themes, identifying limitations and gaps in the literature, and highlighting future directions to bridge these gaps.

RESULTS

The association between bipolar disorder and vascular disease is large in magnitude, consistent across studies, and independent of confounding variables where assessed. The vascular-bipolar link is multifactorial and is difficult to study given the latency between the onset of bipolar disorder, often in adolescence or early adulthood, and subsequent vascular disease, which usually occurs decades later. As a result, studies have often focused on risk factors for vascular disease or intermediate phenotypes, such as structural and functional vascular imaging measures. There is interest in identifying the most relevant mediators of this relationship, including lifestyle (eg, smoking, diet, exercise), medications, and systemic biological mediators (eg, inflammation). Nonetheless, there is a paucity of treatment studies that deliberately engage these mediators, and thus far no treatment studies have focused on engaging vascular imaging targets.

CONCLUSIONS

Further research focused on the vascular-bipolar link holds promise for gleaning insights regarding the underlying causes of bipolar disorder, identifying novel treatment approaches, and mitigating disparities in cardiovascular outcomes for people with bipolar disorder.

Homocysteine, rather than age of onset, is a better predictor for cognitive function in older adults with bipolar disorder

OBJECTIVES

The association between older-age bipolar disorder and cognitive impairments may be mediated by vascular burden. The aim of the study was to examine the difference of cognitive function between older people with late-onset bipolar disorder (LOBD) and early-onset bipolar disorder (EOBD) by considering rigorous vascular risk burden evaluation, comprehensive cognitive tests, and relevant biochemistry data.

METHODS

We recruited 95 outpatients aged over 55 with a DSM-IV-TR diagnosis of bipolar I disorder. Fifty had LOBD, defined by age of onset after 40. Cognitive function was evaluated through a battery of tests assessing verbal memory, attention/speed, visuospatial function, verbal fluency, and cognitive flexibility. Vascular risk assessments included individual disorders, 10-year Framingham cardiovascular risk scores, and serum levels of homocysteine, vitamin B12, folate, and triiodothyronine.

RESULTS

No differences were observed between LOBD and EOBD on any cognitive test after adjusting for potential confounders. In addition to age and educational years, multiple linear regression analyses indicated significantly negative associations between serum homocysteine levels and cognitive performances in attention, psychomotor speed, verbal memory, and executive function.

CONCLUSIONS

Among older people with bipolar disorder, LOBD is not associated with more cognitive dysfunction in this study. However, higher serum homocysteine levels were significantly associated with worse cognitive performance in this particular group. Clinicians therefore have to pay attention to the cognitive function in older bipolar patients with higher levels of homocysteine.