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Research on the risk of stroke following the use of mood stabilisers specific to patients with bipolar disorder is limited.
In this study, we investigated the risk of stroke following the exposure to mood stabilisers in patients with bipolar disorder.
Data for this nationwide population-based study were derived from the Taiwan National Health Insurance Research Database. Among a retrospective cohort of patients with bipolar disorder (n = 19 433), 609 new-onset cases of stroke were identified from 1999 to 2012. A case–crossover study design utilising 14-day windows was applied to assess the acute exposure effect of individual mood stabilisers on the risk of ischaemic, haemorrhagic and other types of stroke in patients with bipolar disorder.
Mood stabilisers as a group were significantly associated with the increased risk of stroke in patients with bipolar disorder (adjusted risk ratio, 1.26; P = 0.041). Among individual mood stabilisers, acute exposure to carbamazepine had the highest risk of stroke (adjusted risk ratio, 1.68; P = 0.018), particularly the ischaemic type (adjusted risk ratio, 1.81; P = 0.037). In addition, acute exposure to valproic acid elevated the risk of haemorrhagic stroke (adjusted risk ratio, 1.76; P = 0.022). In contrast, acute exposure to lithium and lamotrigine did not significantly increase the risk of any type of stroke.
Use of carbamazepine and valproic acid, but not lithium and lamotrigine, is associated with increased risk of stroke in patients with bipolar disorder.
Cancer is a serious public health problem worldwide, and its relationship
with affective disorders is not clear.
To investigate alcohol- and tobacco-related cancer risk among patients
with affective disorders in a large Taiwanese cohort.
Records of newly admitted patients with affective disorders from January
1997 through December 2002 were retrieved from the Psychiatric Inpatient
Medical Claims database in Taiwan. Cancers were stratified by site and
grouped into tobacco- or alcohol-related cancers. Standardised incidence
ratios (SIRs) were calculated to compare the risk of cancer between those
with affective disorders and the general population.
Some 10 207 patients with bipolar disorder and 9826 with major depression
were included. The risk of cancer was higher in patients with major
depression (SIR = 2.01, 95% CI 1.85–2.19) than in those with bipolar
disorder (SIR 1.39, 95% CI 1.26–1.53). The elevated cancer risk among
individuals ever admitted to hospital for affective disorders was more
pronounced in tobacco- and/or alcohol-related cancers.
Elevated cancer risk was found in patients who had received in-patient
care for affective disorders. They require holistic approaches to
lifestyle behaviours and associated cancer risks.
Repeat self-harm is an important risk factor for suicide. Few studies have explored risk factors for non-fatal repeat self-harm in Asia.
To investigate the risk of non-fatal repeat self-harm in a large cohort of patients presenting to hospital in Taipei City, Taiwan.
Prospective cohort study of 7601 patients with self-harm presenting to emergency departments (January 2004–December 2006). Survival analysis was used to examine the rates, timing and factors associated with repeat self-harm.
In total 778 (10.2%) patients presented to hospital with one or more further episodes of self-harm. The cumulative risk of non-fatal repetition within 1 year of a self-harm episode was 9.3% (95% CI 8.7–10.1). The median time to repetition within 1 year was 105 days. Females had a higher incidence of repeat self-harm than males (adjusted hazard ratio 1.25, 95% CI 1.05–1.48) but males had shorter median time to repetition (107 v. 80 days). Other independent risk factors for repeat self-harm within 1 year of an index episode were: young age, self-harm by medicine overdose and increasing number of repeat episodes of self-harm.
The risk of non-fatal repeat self-harm in Taipei City is lower than that seen in the West. Risk factors for repeat non-fatal self-harm differ from those for fatal self-harm. The first 3 months after self-harm is a crucial period for intervention.
Most previous studies of long-term mortality risk following self-harm
have been conducted in Western countries with few studies from Asia.
To investigate suicide and non-suicide mortality after non-fatal
self-harm in Taipei City, Taiwan.
Prospective cohort study (median follow-up 3.3 years) of 7601 individuals
presenting to hospital with self-harm (January 2004 to December 2006).
Standardised mortality ratios (SMRs) for suicide and non-suicide
mortality were calculated.
Suicide risk in the year following self-harm was over 100 times higher
than in the general population (SMR = 119.6, 95% CI 99.6–142.5). Males
and middle-aged and older adults had the highest subsequent risk of
suicide. Compared with people who took an overdose, individuals who used
hanging or charcoal burning in their index episode had the highest risk
of suicide. For non-suicide mortality the SMRs were 6.7 (95% CI 5.7–7.8)
in the first year and 4.4 (95% CI 3.9–4.9) during the whole follow-up
Patterns of increased all-cause and suicide mortality following an
episode of self-harm are similar in Taipei City to those seen in Western
countries. Designing better aftercare following non-fatal self-harm,
particularly for those with underlying physical disorders or who have
used lethal self-harm methods, should be a priority for suicide
prevention programmes in Asia.
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