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J Affect Disord. 2017 Jun;215:77-84. doi: 10.1016/j.jad.2017.03.037. Epub 2017 Mar 16.

Suicidal ideation reported on the PHQ9 and risk of suicidal behavior across age groups.

Author information

1
HealthPartners Institute, Minneapolis, MN, United States. Electronic address: Rebecca.C.Rossom@HealthPartners.com.
2
Kaiser Permanente Southern California Department of Research and Evaluation, Pasadena, CA, United States.
3
Henry Ford Health System, Behavioral Health Services and Center for Health Policy and Health Services Research, Detroit, MI, United States.
4
Kaiser Permanente Colorado Institute for Health Research, Denver, CO, United States.
5
Kaiser Permanente Washington Health Research Institute, Seattle, WA, United States.

Abstract

OBJECTIVE:

The Joint Commission recommends all patients be screened for suicide. However, differences in suicide attempt and death rates may affect how well tools predict risk across age groups. Our objective was to determine whether item 9 of the Patient Health Questionnaire (PHQ9) predicts risk for suicide attempts and deaths across age groups.

METHODS:

PHQ9s completed by adult outpatients treated for mental health conditions in 2010-2012 at four Mental Health Research Network-affiliated healthcare systems were used to measure depression severity and suicidal ideation. Suicide attempts were identified via ICD-9 codes and suicide deaths via ICD-10 codes and state death certificates.

RESULTS:

In all, 939,268PHQ9s were completed by 297,290 outpatients. Compared to those without, those with nearly daily suicidal ideation were 5-to-8 times more likely to attempt suicide and 3-to-11times more likely to die by suicide within 30 days, and 2-to-4times more likely to attempt suicide and 2-to-6 times more likely to die by suicide within 365 days. The increased risk of suicide death for those with any level of suicidal ideation persisted over two years. The relationships between suicide thoughts and attempts and deaths were similar across age groups.

LIMITATIONS:

Our sample was limited to outpatients completing a PHQ9 and relied on pre-existing clinical and administrative data.

CONCLUSIONS:

Suicidal ideation reported on the PHQ9 was a robust predictor of suicide attempts and deaths regardless of age, and this increased risk persisted for two years. Healthcare systems should address both the immediate and sustained risk for suicide for patients of all ages.

KEYWORDS:

Depression; Suicide attempts; Suicide deaths

PMID:
28319695
PMCID:
PMC5412508
DOI:
10.1016/j.jad.2017.03.037
[Indexed for MEDLINE]
Free PMC Article

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