{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T14:45:33Z","timestamp":1787237133969,"version":"build-2736575974"},"reference-count":62,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T00:00:00Z","timestamp":1766534400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["EJIHPE"],"abstract":"<jats:p>(1) Background: Understanding suicide risk across cultures requires examining both universal and culturally specific factors that inform assessment and intervention. This study explores the influence of interpersonal variables\u2014such as interpersonal competence, perceived social support, and constructs from the Interpersonal Theory of Suicide (ITS)\u2014on suicidal behaviour in two culturally distinct samples: young adults from Spain and Japan. (2) Methods: A total of [437] participants (Spanish sample: n = 260; Japanese sample: n = 177) completed validated measures assessing suicide risk, depression, perceived burdensomeness, thwarted belongingness, acquired capability for suicide, interpersonal competence, and perceived social support. Moderated mediation and SEM comparative analyses were conducted to identify predictors of suicide risk in each cultural context. (3) Results: Social support was a consistent protective factor against depression and suicidal ideation, and interpersonal competence showed more contextual protective effects, significant only in the Japanese sample. Perceived burdensomeness stood out as a robust predictor of depression and suicidal ideation in both samples, and suicidal ideation was strongly associated with suicidal behaviour, while acquired capability for suicide and interpersonal competence did not show a direct association with it. (4) Conclusions: The findings highlight the protective role of interpersonal competence and perceived social support in the progression to suicidal behavior, suggesting cultural similarities and differences in how these factors operate.<\/jats:p>","DOI":"10.3390\/ejihpe16010004","type":"journal-article","created":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T14:27:51Z","timestamp":1766586471000},"page":"4","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Interpersonal Determinants of Suicide Risk Among Young Adults: A Cross-Cultural Study"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9148-4925","authenticated-orcid":false,"given":"Noelia Luc\u00eda","family":"Mart\u00ednez-Rives","sequence":"first","affiliation":[{"name":"Department of Psychiatry and Social Psychology, University of Murcia, 30100 Murcia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0405-3455","authenticated-orcid":false,"given":"Pilar","family":"Mart\u00edn Chaparro","sequence":"additional","affiliation":[{"name":"Department of Psychiatry and Social Psychology, University of Murcia, 30100 Murcia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0251-0085","authenticated-orcid":false,"given":"Yasuhiro","family":"Kotera","sequence":"additional","affiliation":[{"name":"Faculty of Medicine & Health Sciences, University of Nottingham, Nottingham NG7 2TU, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,12,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"471","DOI":"10.4992\/jjpsy.90.17241","article-title":"Development of Japanese versions of the interpersonal needs questionnaire and acquired capability for suicide scale","volume":"90","author":"Aiba","year":"2019","journal-title":"Shinrigaku Kenkyu: The Japanese Journal of Psychology"},{"key":"ref_2","first-page":"1","article-title":"Suicidality among college students in Spain: Prevalence and associations with substance use, social support, and resilience","volume":"46","author":"Aizpurua","year":"2021","journal-title":"Death Studies"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"309","DOI":"10.7334\/psicothema2024.341","article-title":"for special issue on understanding and prevention of suicidal behavior: Humanizing care and integrating social determinants","volume":"36","year":"2024","journal-title":"Psicothema"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"991","DOI":"10.1037\/0022-3514.55.6.991","article-title":"Five domains of interpersonal competence in peer relationships","volume":"55","author":"Buhrmester","year":"1988","journal-title":"Journal of Personality and Social Psychology"},{"key":"ref_5","first-page":"315","article-title":"Factors influencing suicidal thoughts in college students","volume":"21","author":"Byun","year":"2020","journal-title":"Journal of the Korean Society for Academia-Industry Cooperation"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2818","DOI":"10.1080\/10410236.2022.2121473","article-title":"The role of interpersonal communication in mental health literacy interventions for young people: A theoretical review","volume":"38","author":"Caban","year":"2022","journal-title":"Health Communication"},{"key":"ref_7","first-page":"2023","article-title":"Interpersonal communication competence and quality of friendship among young adults","volume":"3","author":"Cholappallil","year":"2021","journal-title":"International Research Journal of Modernization in Engineering Technology and Science"},{"key":"ref_8","unstructured":"Comisionado de Salud Mental (2025). 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