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Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments.

Stefansson J, Nordström P, Runeson B, Åsberg M, Jokinen J - BMC Psychiatry (2015)

Bottom Line: 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.Using both the the SIS and the KIVS combined may be better for predicting completed suicide than using them separately.

View Article: PubMed Central - PubMed

Affiliation: Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Building R5, Solna, SE-171 76, Stockholm, Sweden. jon.stefansson@ki.se.

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.

No MeSH data available.


Related in: MedlinePlus

Correlation between SIS and KIVS total scores (r = −0.04, p = 0.74). * = completed suicides, dotted lines = cut-offs from ROC, SIS cut-off = 16. KIVS cut-off = 6
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Fig1: Correlation between SIS and KIVS total scores (r = −0.04, p = 0.74). * = completed suicides, dotted lines = cut-offs from ROC, SIS cut-off = 16. KIVS cut-off = 6

Mentions: Table 1 shows the mean and median SIS and KIVS ratings for suicide victims and survivors. As reported earlier, both SIS and KIVS total scores were significantly higher in suicide victims than in survivors. One of the suicide victims had not been assessed by KIVS. Correlations between KIVS and SIS and the SIS planning subscale were not significant (Table 2). Figure 1 shows SIS and KIVS total scores for surviving suicide attempters and suicide victims.Table 1


Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments.

Stefansson J, Nordström P, Runeson B, Åsberg M, Jokinen J - BMC Psychiatry (2015)

Correlation between SIS and KIVS total scores (r = −0.04, p = 0.74). * = completed suicides, dotted lines = cut-offs from ROC, SIS cut-off = 16. KIVS cut-off = 6
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4581451&req=5

Fig1: Correlation between SIS and KIVS total scores (r = −0.04, p = 0.74). * = completed suicides, dotted lines = cut-offs from ROC, SIS cut-off = 16. KIVS cut-off = 6
Mentions: Table 1 shows the mean and median SIS and KIVS ratings for suicide victims and survivors. As reported earlier, both SIS and KIVS total scores were significantly higher in suicide victims than in survivors. One of the suicide victims had not been assessed by KIVS. Correlations between KIVS and SIS and the SIS planning subscale were not significant (Table 2). Figure 1 shows SIS and KIVS total scores for surviving suicide attempters and suicide victims.Table 1

Bottom Line: 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.Using both the the SIS and the KIVS combined may be better for predicting completed suicide than using them separately.

View Article: PubMed Central - PubMed

Affiliation: Department of Clinical Neuroscience, Psychiatry Section, Karolinska Institutet, Karolinska University Hospital, Building R5, Solna, SE-171 76, Stockholm, Sweden. jon.stefansson@ki.se.

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.

No MeSH data available.


Related in: MedlinePlus