JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Three-year mortality in relation to early hospitalization and number of outpatient clinic visits in people with newly diagnosed bipolar disorder.

OBJECTIVE: Whether the early treatment pattern in people with bipolar disorder (BD) could influence later mortality remains to be determined. We aimed to explore the potential effects of early hospitalization and number of outpatient clinic visits on the 3-year mortality in patients with newly diagnosed BD.

METHOD: Adult participants with newly diagnosed BD were identified in Taiwan's National Health Insurance Research Database in 2008. Survival analyses were performed with this national cohort to examine the associations between the first-year treatment pattern (hospitalization and number of outpatient clinic visits) and mortality over a follow-up period of 3 years (2008-2011).

RESULTS: A total of 15,254 participants were included. The mean age was 44.9 (S.D.=16.7) years and around 39.9% were male. The average follow-up time was 1055 days. Compared to BD patients with ≥7 times outpatient clinic visits within the first year, the risk of mortality was found elevated [hazard ratio=1.74; 95% confidence interval (CI), 1.40-2.15] for those who needed inpatient treatment. Number of outpatient clinic visits within the first year was found to be negatively associated with later mortality. Besides cancer (hazard ratio=2.14; 95% CI, 1.74-2.63), diabetes mellitus (hazard ratio=1.61; 95% CI, 1.38-1.89) and renal disease (hazard ratio=1.65; 95% CI, 1.36-2.00) were associated with the highest risk of mortality among the physical comorbidities. Substance use disorder stood out as the single comorbid mental illness associated with the highest mortality risk (hazard ratio=1.74; 95% CI, 1.37-2.21).

CONCLUSIONS: Early treatment pattern, including hospitalization and number of outpatient clinic visits, was associated with later mortality in BD patients. Special care should be given to enhance treatment adherence and to give psychoeducation to those with certain comorbid mental/physical illnesses to reduce health harming behavior and to improve health outcome.

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