Protocol - Suicidal Intent of Suicide Attempts
The Suicide Intent Scale (SIS) includes 15 interviewer-administered items that measure behavior before and during the most recent suicide attempt. Items 1-8 cover objective circumstances surrounding the attempt (e.g., preparation and execution of the attempt). Items 9-15 capture perceptions of potential lethality, expectations of rescue, purpose of the attempt, impulsivity, and reaction to the attempt. Each of the 15 items is scored from 0 to 2 and added together to give a total score from 0 to 30.
A self-report version of the Suicide Intent Scale is also available.
This protocol includes questions that can potentially identify respondents who are at risk of suicide. Investigators implementing this protocol should consider developing a risk management plan specific to their study to ensure the safety of participants. The following links provide additional information and guidelines for suicide-related research:
SUICIDE INTENT SCALE
Instructions: Interview the patient about his/her most recent suicide attempt to enable a reliable coding of the objective circumstances of the attempt, and the patient’s perceptions of the attempt. The total score is computed by summing items 1-15. If an item is "Not applicable" code it "-8." Do not include"-8’s" when calculating the total score.
I. Objective Circumstances Related to Suicide Attempt
0[ ]Somebody present
1[ ]Somebody nearby, or in visual or vocal contact
2[ ]No one nearby or in visual or vocal contact
0[ ]Intervention is probable
1[ ]Intervention is not likely
2[ ]Intervention in highly unlikely
3. Precautions against Discovery/Intervention
0[ ]No precautions
1[ ]Passive precautions (avoiding others but doing nothing to prevent intervention; alone in room with unlocked door)
2[ ]Active precautions (locked door)
4. Acting to Get Help During/After Attempt
0[ ]Notified potential helper regarding attempt
1[ ]Contacted but did not specifically notify potential helper regarding attempt
2[ ]Did not contact or notify potential helper
5. Final Acts in Anticipation of Death (e.g., will, gifts, insurance)
1[ ]Thought about or made some arrangements
2[ ]Made definite plans or completed arrangements
6. Active Preparation for Attempt
1[ ]Minimal to moderate
7. Suicide Note
0[ ]Absence of note
1[ ]Note written, but torn up; note thought about
2[ ]Presence of note
8. Overt Communication of Intent Before the Attempt
1[ ]Equivocal communication
2[ ]Unequivocal communication
9. Alleged Purpose of Attempt
0[ ]To manipulate environment, get attention, revenge
1[ ]Components of "0" and "2"
2[ ]To escape, surcease, solve problems
10. Expectations of Fatality
0[ ]Thought that death was unlikely
1[ ]Thought that death was possible but not probable
2[ ]Thought that death was probable or certain
11. Conception of Method’s Lethality
0[ ]Did less to self than he thought would be lethal
1[ ]Wasn’t sure if what he did would be lethal
2[ ]Equaled or exceeded what he thought would be lethal
12. Seriousness of Attempt
0[ ]Did not seriously attempt to end life
1[ ]Uncertain about seriousness to end life
2[ ]Seriously attempted to end life
13. Attitude Toward Living/Dying
0[ ]Did not want to die
1[ ]Components of "0" and "2"
2[ ]Wanted to die
14. Conception of Medical Rescuability
0[ ]Thought that death would be unlikely if he received medical attention
1[ ]Was uncertain whether death could be averted by medical attention
2[ ]Was certain of death even if he received medical attention
15. Degree of Premeditation
0[ ]None; Impulsive
1[ ]Suicide contemplated for three hours or less prior to attempt
2[ ]Suicide contemplated for more than three hours prior to attempt
III. Other Aspects (Not Included in Total Score)
16. Reaction to Attempt
0[ ]Sorry about attempt; feels foolish, ashamed (circle which one)
1[ ]Accepts both attempt and its failure
2[ ]Regrets failure of attempt
17. Visualization of Death
0[ ]Life-after-death, reunion with decedents
1[ ]Never ending sleep, darkness, end-of-things
2[ ]No conceptions of, or thoughts about death
18. Number of Previous Attempts
1[ ]One or two
2[ ]Three or more
19. Relationship between Alcohol Intake and Attempt
0[ ]Some alcohol intake prior to but not related to attempt, reportedly not enough to impair judgment, reality testing
1[ ]Enough alcohol intake to impair judgment, reality testing and diminish responsibility/impulse control
2[ ]Intentional intake of alcohol in order to facilitate implementation of suicide attempt
20. Relationship between Drug Intake and Attempt (narcotics, hallucinogens, etc. drug is not the method used to suicide)
0[ ]Some drug intake prior to but not related to attempt, reportedly not enough to impair judgment, reality testing
1[ ]Enough drug intake to impair judgment, identity testing and diminish responsibility/impulse control
2[ ]Intentional drug intake in order to facilitate implementation of suicide attempt
Each of the 15 items is scored from 0 to 2 and added together to give a total score from 0 to 30.
Personnel and Training Required
The interviewer must be trained to conduct personal interviews with individuals from the general population. The interviewer must be trained and found to be competent (i.e., tested by an expert) at the completion of personal interviews. The interviewer should be trained to prompt respondents further if a "don’t know" response is provided.
The PhenX Working Group acknowledges these questions can be administered by the interviewer in a computerized or noncomputerized format (i.e., paper-and-pencil instrument). Computer software is necessary to develop computer-assisted instruments. The interviewer will require a laptop computer/handheld computer to administer a computer-assisted questionnaire.
|Specialized requirements for biospecimen collection||No|
|Average time of greater than 15 minutes in an unaffected individual||No|
Mode of Administration
Adults, ages 18 and older
The Suicide Intent Scale (SIS) is a nonproprietary, widely used, low-burden questionnaire with high internal consistency, moderate-to-high interrater reliability, and evidence of convergent validity and predictive validity.
|Human Phenotype Ontology||Suicidal Ideation||HP:0031589||HPO|
|caDSR Form||PhenX PX640301 - Suicidal Intent Of Suicide Attempts||6232885||caDSR Form|
Process and Review
Protocol Name from Source
The Suicide Intent Scale (SIS)
Beck, A. T., Schuyler, D., & Herman, I. (1974). Development of suicidal intent scales. In A. T. Beck, H. L. P. Resnik, & D. J. Lettieri (Eds.). The prediction of suicide (pp. 45-56). Bowie, MD: Charles Press.
Beck, A. T., & Lester, D. (1976). Components of suicidal intent in completed and
attempted suicides. The Journal of Psychology, 92, 35-38.
Beck, A. T., Resnik, H. L., & Lettieri, D. J. (1974). The prediction of suicide. Philadelphia, PA: Charles Press.
Beck, A. T., Weissman, A., Lester, D., & Trexler, L. (1976). Classification of suicidal behaviors. II. Dimensions of suicidal intent. Archives of General Psychiatry, 33, 835-837.
Beck, R. W., Morris, J. B., & Beck, A. T. (1974). Cross-validation of the Suicidal Intent Scale. Psychological Reports, 34, 445-446.
Mieczkowski, T. A., Sweeney, J. A., Haas, G. L., Junker, B. W., Brown, R. P., & Mann, J. J. (1993). Factor composition of the Suicide Intent Scale. Suicide and Life-Threatening Behavior, 23(1), 37-45.
Ojehagen, A., Regnell, G., & Traskman-Bendz, L. (1991). Deliberate self-poisoning: Repeaters and nonrepeaters admitted to an intensive care unit. Acta Psychiatrica Scandinavica, 84, 266-271.
|Variable Name||Variable ID||Variable Description||dbGaP Mapping|
|PX640301190000||Other Aspects Relationship between Alcohol more||N/A|
|PX640301130000||Self-Report Attitude Toward Living/Dying||N/A|
|PX640301060000||Objective Circumstances Related to Suicide more||N/A|
|PX640301080000||Objective Circumstances Related to Suicide more||N/A|
|PX640301050000||Objective Circumstances Related to Suicide more||N/A|
|PX640301040000||Objective Circumstances Related to Suicide more||N/A|
|PX640301010000||Objective Circumstances Related to Suicide more||N/A|
|PX640301070000||Objective Circumstances Related to Suicide more||N/A|
|PX640301030000||Objective Circumstances Related to Suicide more||N/A|
|PX640301020000||Objective Circumstances Related to Suicide more||N/A|
|PX640301110000||Self-Report Conception of Method's Lethality||N/A|
|PX640301140000||Self-Report Conception of Medical Rescuability||N/A|
|PX640301200000||Other Aspects Relationship between Drug more||N/A|
|PX640301100000||Self-Report Expectations of Fatality||N/A|
|PX640301180000||Other Aspects Number of Previous Attempts||N/A|
|PX640301150000||Self-Report Degree of Premeditation||N/A|
|PX640301090000||Self-Report Alleged Purpose of Attempt||N/A|
|PX640301160000||Other Aspects Reaction to Attempt||N/A|
|PX640301120000||Self-Report Seriousness of Attempt||N/A|
|PX640301170000||Other Aspects Visualization of Death||N/A|
Suicidal Intent of Suicide Attempts
November 21, 2014
A questionnaire to measure of the degree of intent to commit suicide during a suicide attempt.
Suicidal intent reflects the intensity of a respondent’s wish to die, and higher levels of intent indicate higher levels of suicide risk.
suicidal intent of suicide attempts, suicide, Suicide intent, Suicide attempts, Suicide Intent Scale, SIS
|Protocol ID||Protocol Name|
|640301||Suicidal Intent of Suicide Attempts|
Goodman, M., et al. (2020) Group (?Project Life Force?) versus individual suicide safety planning: A randomized clinical trial. Contemporary Clinical Trials Communications. 2020 January; 17: 100520. doi: 10.1016/j.conctc.2020.100520
Bryan, C. J., et al. (2019) The PRImary care Screening Methods (PRISM) study: Rationale and design considerations. Contemporary Clinical Trials. 2019 September; 84: 105823. doi: 10.1016/j.cct.2019.105823
Bryan, C. J., et al. (2019) Examining emotion relief motives as a facilitator of the transition from suicidal thought to first suicide attempt among active duty soldiers. Psychological Services. 2019 May; 16(2): 293-301. doi: 10.1037/ser0000234