Mohammadali Amini-Tehrani1, Mohammad Nasiri2, Tina Jalali3, Raheleh Sadeghi3, Amene Ghotbi3, Hadi Zamanian4. 1. Department of Psychology and Education, University of Tehran, Tehran, Iran; Health Psychology and Behavior Medicine Research Group, Student Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran. 2. Department of Psychology and Education, University of Tehran, Tehran, Iran. 3. Health Psychology and Behavior Medicine Research Group, Student Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran. 4. Health Psychology and Behavior Medicine Research Group, Student Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran; Qom University of Medical Sciences, Qom, Iran. Electronic address: Zamanian@alumnus.tums.ac.ir.
Abstract
BACKGROUND: Suicide is increasing in young Iranian population, which necessitates the employing of valid, yet abridged instruments assessing the constellation of suicide-related behaviors. The study aimed at validating Suicide Behavior Questionnaire-Revised (SBQ-R) among Iranian undergraduates. METHODS: A total of 487 undergraduates were surveyed in 2018. Construct validity of SBQ-R was examined via confirmatory factor analysis (CFA), and Spearman's correlation with two single-item indices of suicide acceptability (SA) and lifetime suicidal ideation (LSI) was determined. Logistic regression and Kruskal-Wallis tests were used to examine the cut-off points (≥ 7 and ≥ 8) and categorizations as per item 1. RESULTS: The mean SBQ-R score was 5.79 ± 3.55. Cut-off points ≥ 7 and ≥ 8 categorized 150 (30.8%) and 123 (25.2%) samples with suicide risk, respectively. Women obtained significantly higher scores on all indices, except items 1 and 4. CFA confirmed the model with sound goodness-of-fit, with factor loadings of 0.70 to 0.83. Composite reliability and average variance extracted were 0.87 and 0.63, respectively. The SBQ-R's correlation with SA and LSI confirmed its concurrent validity. Regression analysis confirmed the ability of both cut-off points to distinguish the participants with high SA and LSI; however, the cut-off point ≥ 8 produced better results regarding high LSI. Based on item 1, normal versus low- and high-risk samples were significantly different in terms of SA, LSI, and adjusted total score of SBQ-R (P < 0.0001). CONCLUSION: SBQ-R is an economic and psychometrically sound tool, which can be utilized to identify suicide-related behaviors and risks in young Iranian population.
BACKGROUND: Suicide is increasing in young Iranian population, which necessitates the employing of valid, yet abridged instruments assessing the constellation of suicide-related behaviors. The study aimed at validating Suicide Behavior Questionnaire-Revised (SBQ-R) among Iranian undergraduates. METHODS: A total of 487 undergraduates were surveyed in 2018. Construct validity of SBQ-R was examined via confirmatory factor analysis (CFA), and Spearman's correlation with two single-item indices of suicide acceptability (SA) and lifetime suicidal ideation (LSI) was determined. Logistic regression and Kruskal-Wallis tests were used to examine the cut-off points (≥ 7 and ≥ 8) and categorizations as per item 1. RESULTS: The mean SBQ-R score was 5.79 ± 3.55. Cut-off points ≥ 7 and ≥ 8 categorized 150 (30.8%) and 123 (25.2%) samples with suicide risk, respectively. Women obtained significantly higher scores on all indices, except items 1 and 4. CFA confirmed the model with sound goodness-of-fit, with factor loadings of 0.70 to 0.83. Composite reliability and average variance extracted were 0.87 and 0.63, respectively. The SBQ-R's correlation with SA and LSI confirmed its concurrent validity. Regression analysis confirmed the ability of both cut-off points to distinguish the participants with high SA and LSI; however, the cut-off point ≥ 8 produced better results regarding high LSI. Based on item 1, normal versus low- and high-risk samples were significantly different in terms of SA, LSI, and adjusted total score of SBQ-R (P < 0.0001). CONCLUSION:SBQ-R is an economic and psychometrically sound tool, which can be utilized to identify suicide-related behaviors and risks in young Iranian population.