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Factor composition of the Suicide Intent Scale

T A Mieczkowski¹, J A Sweeney, G L Haas

¹University of Pittsburgh, School of Medicine.

Suicide & Life-Threatening Behavior

|January 1, 1993

Summary

The Suicide Intent Scale effectively measures two key aspects of suicide attempts: lethal intent and planning. This analysis confirms its utility in evaluating distinct components of suicidal behavior in psychiatric patients.

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Area of Science:

Psychiatry
Psychological Assessment
Suicidology

Background:

Suicidal behavior is a significant public health concern.
Accurate assessment of suicide intent is crucial for risk stratification and intervention.
The Suicide Intent Scale (SIS) is a tool used to measure the degree of intent behind a suicide attempt.

Purpose of the Study:

To conduct an exploratory factor analysis of the Suicide Intent Scale (SIS).
To examine the underlying factor structure of the SIS in psychiatric inpatients who have attempted suicide.
To determine if the SIS can differentiate between distinct dimensions of suicide intent.

Main Methods:

Exploratory factor analysis was employed.
A method suitable for polychotomous data was utilized.

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The analysis was performed on a sample of 98 psychiatric inpatients with a history of suicide attempts.

Main Results:

A two-factor solution emerged from the analysis.
The first factor, 'Lethal Intent,' captured subjective levels of intent.
The second factor, 'Planning,' encompassed objective planning behaviors related to the suicide attempt.

Conclusions:

The Suicide Intent Scale (SIS) appears to measure two separate dimensions of suicidal behavior: lethal intent and planning.
These findings support the SIS's utility in assessing distinct aspects of suicide intent.
The scale can aid in a more nuanced understanding of suicidal behavior in clinical settings.