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Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments.
BMC Psychiatry. 2015 Sep 23; 15:226.BP

Abstract

BACKGROUND

High suicide intent, childhood trauma, and violent behavior are risk factors for suicide in suicide attempters. The aim of this study was to investigate whether the combined assessment of suicide intent and interpersonal violence would provide a better prediction of suicide risk than an assessment of only suicide intent or interpersonal violence.

METHODS

This is a cohort study involving 81 suicide attempters included in the study between 1993 and 1998. Patients were assessed with both the Suicide Intent Scale (SIS) and the Karolinska Interpersonal Violence Scale (KIVS). Through the unique personal identification number in Sweden, patients were linked to the Cause of Death Register maintained by the Swedish National Board of Health and Welfare. Suicides were ascertained from the death certificates.

RESULTS

Seven of 14 patients who had died before April 2013 had committed suicide. The positive predictive value for the Suicide Intent Scale alone was 16.7 %, with a specificity of 52 % and an area under the curve of 0.74. A combined assessment with the KIVS gave higher specificity (63 %) and a positive predictive value of 18.8 % with an AUC of 0.83. Combined use of SIS and KIVS expressed interpersonal violence as an adult subscale gave a sensitivity of 83.3 %, a specificity of 80.3 %, and a positive predictive value of 26 % with an AUC of 0.85. The correlation between KIVS and SIS scores was not significant.

CONCLUSIONS

Using both the the SIS and the KIVS combined may be better for predicting completed suicide than using them separately. The nonsignificant correlation between the scales indicates that they measure different components of suicide risk.

Authors+Show Affiliations

Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Building R5, Solna, SE-171 76, Stockholm, Sweden. jon.stefansson@ki.se.Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Building R5, Solna, SE-171 76, Stockholm, Sweden. peter.nordstrom@ki.se.Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Building R5, Solna, SE-171 76, Stockholm, Sweden. bo.runeson@ki.se.Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, Stockholm, Sweden. marie.asberg@ki.se.Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Building R5, Solna, SE-171 76, Stockholm, Sweden. jussi.jokinen@ki.se. Department of Clinical Sciences, Umeå University, Umeå, Sweden. jussi.jokinen@ki.se.

Pub Type(s)

Journal Article
Observational Study
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26400812

Citation

Stefansson, J, et al. "Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in Suicide Risk Assessments." BMC Psychiatry, vol. 15, 2015, p. 226.
Stefansson J, Nordström P, Runeson B, et al. Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments. BMC Psychiatry. 2015;15:226.
Stefansson, J., Nordström, P., Runeson, B., Åsberg, M., & Jokinen, J. (2015). Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments. BMC Psychiatry, 15, 226. https://doi.org/10.1186/s12888-015-0607-6
Stefansson J, et al. Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in Suicide Risk Assessments. BMC Psychiatry. 2015 Sep 23;15:226. PubMed PMID: 26400812.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments. AU - Stefansson,J, AU - Nordström,P, AU - Runeson,B, AU - Åsberg,M, AU - Jokinen,J, Y1 - 2015/09/23/ PY - 2015/02/17/received PY - 2015/09/10/accepted PY - 2015/9/25/entrez PY - 2015/9/25/pubmed PY - 2016/5/18/medline SP - 226 EP - 226 JF - BMC psychiatry JO - BMC Psychiatry VL - 15 N2 - BACKGROUND: High suicide intent, childhood trauma, and violent behavior are risk factors for suicide in suicide attempters. The aim of this study was to investigate whether the combined assessment of suicide intent and interpersonal violence would provide a better prediction of suicide risk than an assessment of only suicide intent or interpersonal violence. METHODS: This is a cohort study involving 81 suicide attempters included in the study between 1993 and 1998. Patients were assessed with both the Suicide Intent Scale (SIS) and the Karolinska Interpersonal Violence Scale (KIVS). Through the unique personal identification number in Sweden, patients were linked to the Cause of Death Register maintained by the Swedish National Board of Health and Welfare. Suicides were ascertained from the death certificates. RESULTS: Seven of 14 patients who had died before April 2013 had committed suicide. The positive predictive value for the Suicide Intent Scale alone was 16.7 %, with a specificity of 52 % and an area under the curve of 0.74. A combined assessment with the KIVS gave higher specificity (63 %) and a positive predictive value of 18.8 % with an AUC of 0.83. Combined use of SIS and KIVS expressed interpersonal violence as an adult subscale gave a sensitivity of 83.3 %, a specificity of 80.3 %, and a positive predictive value of 26 % with an AUC of 0.85. The correlation between KIVS and SIS scores was not significant. CONCLUSIONS: Using both the the SIS and the KIVS combined may be better for predicting completed suicide than using them separately. The nonsignificant correlation between the scales indicates that they measure different components of suicide risk. SN - 1471-244X UR - https://www.unboundmedicine.com/medline/citation/26400812/Combining_the_Suicide_Intent_Scale_and_the_Karolinska_Interpersonal_Violence_Scale_in_suicide_risk_assessments_ L2 - https://bmcpsychiatry.biomedcentral.com/articles/10.1186/s12888-015-0607-6 DB - PRIME DP - Unbound Medicine ER -