Group (Project Life Force) vs. Individual Suicide Safety Planning RCT

Columbia Suicide Rating Scale (C-SSRS) will be used to count prospective or treatment emergent suicidal behaviors. The CSSRS has been used in many treatment trials, and to measure treatment emergent suicidal events during pharmacotherapy. C-SSRS contains a subscale on suicidal ideation which is scored from 1-5; higher numbers indicate increased suicidal thinking. The definition of suicide attempt for the primary outcome will consist of any actual suicide attempt, aborted suicide attempt, or interrupted suicide attempt according to the CSSR-S.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: TAU has 106 participants, but one participant was excluded because we were missing their suicide attempt history information (which the analytic model adjusted for).

At month 42, each site's research assistant will query the site's state vital statistics registry for all individuals on this list. For all those who are found to be deceased, data will be abstracted pertaining to his/her death and the probability of suicide from the Death Certificate. The 12-month delay in review is necessary because of the well-known lag in recording deaths in state vital statistics registries.

Time frame: 12 Month

Population: Data for suicidal behavior measured by the (1) Columbia-Suicide Severity Rating Scale (C-SSRS); Suicidal behavior by Chart Abstraction; and the Death by Suicide by National Death Index Survey Findings were combined into one metric. We mistakenly registered the three outcomes separately, but we intended to use these three data sources to make one suicide attempt variable. As such, we reported all suicidal behavior descriptives and models under the C-SSRS outcome.

An independent research assessor who is blinded to study condition will complete all outcome assessments. Data for all types of suicidal behavior including suicides, suicide attempts, interrupted attempts, aborted attempts, and preparatory behavior for suicide, will be obtained. The nomenclature and definitions for suicide-related behaviors will follow the Center for Disease Control and Prevention's (CDC) definitions. Suicidal behavior over the 12-month time frame is a cumulative outcome such that detection of suicidal behavior at any of the outcome points, or by any method, leads to a positive indication for the suicidal behavior composite.

Time frame: 12 Month

Population: Data for suicidal behavior measured by the (1) Columbia-Suicide Severity Rating Scale (C-SSRS); Suicidal behavior by Chart Abstraction; and the Death by Suicide by National Death Index Survey Findings were combined into one metric. We mistakenly registered the three outcomes separately, but we intended to use these three data sources to make one suicide attempt variable. As such, we reported all suicidal behavior descriptives and models under the C-SSRS outcome.

The Alcohol Use Disorders Identification Test-Concise (AUDIT-C) is a brief 3-item alcohol screening tool used to identify individuals who may be at risk for hazardous drinking or have an alcohol use disorder. Each item is rated from 0 to 4, and total scores range from 0 - 12. Higher scores indicated an increased likelihood that an individual's drinking is endangering his or her safety.

Time frame: 12 Month

Population: This measure was only administered at the 12-month follow-up. 124 participants filled out the DAST-10 at this assessment point.

The Beck Depression Inventory-II (BDI-II) measures depressive severity with 21 items on a Likert scale. It has high internal consistency, construct validity, and test-retest reliability. Each question has a set of at least four possible answer choices ranging in intensity. When the test is scored, a value of 0 to 3 is assigned for each answer, and items are summed for a total score (ranging from 0-63). Higher scores indicate worse depressive severity.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The Beck Hopelessness Scale (BHS) measures hopelessness with 20 binary (true/false) items. Items are recoded so that optimistic beliefs equal 0 and pessimistic beliefs equal 1. Recoded items are summed for a total score (ranging from 0-20), and higher scores indicate more severe hopelessness. The BHS demonstrates excellent internal reliability and external validity.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The DAST-10 measures drug use over the past twelve months to identify potential drug use disorder with 10 binary items (0/1). Total scores range from 0 to 10. Scores of 0 indicate no problems, 1-2 low-level, 3-5 moderate level, 6-8 substantial level, and 9-10 severe level.

Time frame: 12 Month

Population: This measure was only administered at the 12-month follow-up. 81 participants filled out the DAST-10 at this assessment point.

Outpatient Mental Health Treatment Utilization was quantified using CPRS. The number of outpatient non-PLF mental health visits from the past three months was counted.

Time frame: 12 Month

The Suicide-Related Coping Scale (SRCS) has 17 items assessing suicide-related coping (knowledge of, and perceived confidence in, using internal coping strategies and external supports to regulate suicidal thoughts and urges). Items are rated on a 5-point scale (Strongly disagree (0) - Strongly agree (4)). All items are summed for a total score (range 0-68), and the first 14 items can also be used for external coping and internal coping subscales (7 items each; total range 0-28). Higher scores show improved suicide-related coping. The SRCS has acceptable internal and external validity.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The Beck Lethality Scale (BLS) is an interview-administered measure of medical lethality of a suicide attempt for eight possible methods (i.e., coma-producing drugs, non-coma-producing drugs, shooting, burning, drowning, cutting, jumping, and hanging). The BLS was used following suicidal behavior over the full study duration. Each item (i.e., each method) is rated from 0 (none or minimal damage) to 10 (death) based on an examination of the patient's physical condition on admission, review of the medical charts, and consultation with the attending physician. Higher scores on each method indicate higher lethality for that method. The highest lethality rating across all of the eight methods (none or minimal damage to death) was used as a total score.

Time frame: 12 Month

Population: Number of people who had a suicide attempt (actual attempt) over the study course, excluding baseline attempts, and filled out the Beck Lethality Scale about these attempts.

The Suicide Intent Scale (SIS) measures the retrospective intensity of the wish to die at the time of a suicide attempt with 20 items. Each item is graded in intensity from 0 to 2, and the first 15 items are summed for a total score (ranging from 0 to 30). Higher scores indicate higher suicide intent. The SIS has high inter-rater reliability and internal consistency.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The Buss-Perry Aggression Questionnaire (BPAQ) assesses aggression in four domains (anger, hostility, physical aggression, and verbal aggression) with 29 items on a 4-point scale (Extremely uncharacteristic (0) - Extremely characteristic (3)). Items in each domain are summed for domain scores, and higher scores indicate more aggression severity in the respective domain. Total score ranges are: anger: 7-35, hostility: 8-40, physical aggression: 9-45, verbal aggression: 5-25.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The Insomnia Severity Index (ISI) is a 7-item brief screening measure of insomnia. Items include insomnia severity (falling asleep, staying asleep, and waking too early), satisfaction with sleep, the extent to which sleep difficulties impair daily functioning, how noticeable low quality of life due to sleep difficulties is to others, and distress about sleep difficulties. Item responses range from 0 - 4 and are summed for total scores (range 0-28). Higher scores indicate more severe insomnia. The ISI has good internal consistency and validity for treatment research.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The Interpersonal Needs Questionnaire-15 (INQ-15) consists of 15 items assessing thwarted interpersonal needs along two domains: Thwarted Belongingness (TB, nine items) and Perceived Burdensomeness (PB, six items). All items are rated from one (not at all true for me) to seven (very true for me). Six items from the TB subscale are reverse-keyed and reverse-scored. Items are summed for total scores (TB total score range: 9-63 and PB score range: 6-42). Higher scores indicate increased severity of TB and PB.

Time frame: Baseline, 3 Month, 6 Month, 12 Month

Population: Participant drop-out and missing assessment points occurred throughout the duration of the study.

The Mini International Neuropsychiatric Interview (MINI) is a structured diagnostic interview that assesses the presence of psychiatric disorders according to DSM-IV or ICD-10 criteria, with good interrater and test-retest reliability. The MINI was used to determine psychiatric diagnoses (lifetime and current).

Time frame: Baseline

Population: This measure was used for the study's eligibility criteria and was not intended to be an outcome measure.

The Mini Mental State Exam is a questionnaire used to measure cognitive impairment. This scale has good validity and construct validity and will be used to examine if participants are cognitively able to participate in the study.

Time frame: Baseline

Population: This measure was used for the study's eligibility criteria and was not intended to be an outcome measure.

The Ohio State University Traumatic Brain Injury Identification Method is a standardized, 3-5-minute structured interview designed elicit a person's lifetime history of TBI.

Time frame: Baseline

Population: This measure was used for the study's eligibility criteria and was not intended to be an outcome measure.

Group cohesion will be measured by the The Group Cohesion Scale-Revised, a 25-item self-report measure that assesses aspects of group cohesion including communication, interaction, member retention, decision making, vulnerability among group members and consistency between group and individual goals with a four-point scale. This scale will be used for participants randomized to the PLF treatment at 3 times points before a group session. The scale demonstrated high validity and reliability in research settings and was found to be sensitive to change in a psychodrama group treatment.

Time frame: Weeks 1, 5, 10

Population: Data were not collected on this scale when the protocol shifted to virtual treatment due to COVID-19.