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BMC Medicine
Published in: BMC Medicine 1/2019

Open Access 01-12-2019 | Suicide | Research article

Suicide attempts in US adults with lifetime DSM-5 eating disorders

Authors: Tomoko Udo, Sarah Bitley, Carlos M. Grilo

Published in: BMC Medicine | Issue 1/2019

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Abstract

Background

Rates of suicide are increasing in the US. Although psychiatric disorders are associated with suicide risk, there is a dearth of epidemiological research on the relationship between suicide attempts (SAs) and eating disorders (EDs). The study therefore aimed to examine prevalence and correlates of SAs in DSM-5 EDs—anorexia nervosa (AN), bulimia nervosa (BN), and binge eating disorder (BED)—in a nationally representative sample of US adults. In addition, prevalence and correlates of SAs were examined in the two subtypes of AN—restricting (AN-R) and binge/purge (AN-BP) types.

Methods

The study included 36,171 respondents in the Third National Epidemiological Survey on Alcohol and Related Conditions (NESARC-III) who completed structured diagnostic interviews (AUDADIS-5) and answered questions regarding SA histories and psychosocial impairment associated with EDs. We evaluated lifetime prevalence of SA, psychosocial impairment, clinical profiles, and psychiatric comorbidity in adults with EDs with and without SA histories, and temporal relationships between age onset of SA and EDs.

Results

Prevalence estimates of suicide attempts were 24.9% (for AN), 15.7% (for AN-R), 44.1% (for AN-BP), 31.4% (for BN), and 22.9% (for BED). Relative to respondents without specific EDs, adjusted odds ratios (AORs) of SAs were significantly greater in all EDs: AN = 5.40 (95% confidence intervals [CIs] = 3.80–7.67), AN-R = 3.16 (95% CIs = 1.82–5.42), AN-BP = 12.09 (95% CIs = 6.29–23.24), BN = 6.33 (95% CIs = 3.39–11.81), and BED = 4.83 (95% CIs = 3.54–6.60). Among those with SA history, mean age at first SA and number of SAs were not significantly different across the specific EDs. SA was associated with significantly earlier ED onset in BN and BED, longer duration of AN but shorter duration of BN, greater psychosocial impairment in AN and BN, and with significantly increased risk for psychiatric disorder comorbidity across EDs. Onset of BED was significantly more likely to precede SA (71.2%) but onsets of AN (50.4%) and BN (47.6%) were not.

Conclusions

US adults with lifetime DSM-5 EDs have significantly elevated risk of SA history. Even after adjusting for sociodemographic factors, those with lifetime EDs had a roughly 5-to-6-fold risk of SAs relative to those without specific EDs; the AN binge/purge type had an especially elevated risk of SAs. SA history was associated with distinctively different clinical profiles including greater risk for psychosocial impairment and psychiatric comorbidity. These findings highlight the importance of improving screening for EDs and for suicide histories.
Appendix
Available only for authorised users
Footnotes
1
In the original data set, respondents who reported no SA history were assigned missing for the number of SA, which we re-coded to zero for the purpose of the analyses.
 
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Metadata
Title
Suicide attempts in US adults with lifetime DSM-5 eating disorders
Authors
Tomoko Udo
Sarah Bitley
Carlos M. Grilo
Publication date
01-12-2019
Publisher
BioMed Central
Published in
BMC Medicine / Issue 1/2019
Electronic ISSN: 1741-7015
DOI
https://doi.org/10.1186/s12916-019-1352-3

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