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Abstract:
This study examines the longitudinal associations between psychotic
experiences (PE) and incident suicidal ideation and behaviour in the
general population, and to what degree the association may be confounded
by non-psychotic psychopathology. Data from three prospective, general
population cohorts were combined into one dataset (n=15,837) and
analysed using logistic regression, controlling for continuous measures
of depression, anxiety and mania symptoms. Analyses were conducted in
the entire sample, and in subsamples stratified by presence or absence
of mental disorders. The presence of PE at baseline increased the risk
of incident suicidal ideation and behaviour. However, adjustment for
dimensional measures of psychopathology reduced effect sizes, although
PE remained significantly associated with suicide attempts. Further
examination of the associations revealed that PE were only associated
with suicide attempts in individuals with at least one mental disorder.
Similarly, in individuals without mental disorders, the risk of suicidal
ideation increased as PE co-occurred with more symptom domains. The
results of this study confirm that individuals with PE are at increased
risk of suicidal ideation and behaviour. However, these associations are
not specific, but reflect the increased risk of suicidal ideation in
individuals with subthreshold multidimensional psychopathology and
suicide attempts in individuals with co-occurring mental disorders. (C)
2016 Elsevier Ireland Ltd. All rights reserved.
