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The purpose of this study was to investigate the factors associated with suicidal ideation in drug addicts based on the Theory of Planned Behavior (TPB).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Method<\/jats:title>\n                <jats:p>This cross-sectional study was conducted with 2160 of drug addicts in private and public clinics for quitting addiction through methadone treatment in Shiraz city, Fars province, Iran from October 2018 to June 2019. Data gathering tools were a questionnaire on demographic characteristics, the Beck Scale for Suicidal Ideation and a questionnaire based on constructs of TPB. Data were analysed by SPSS 22 using descriptive statistics (mean, standard deviation, and frequency) and statistical tests (independent t-test, Pearson correlation coefficient, and linear regression). The significance level was considered 0.05.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The mean age of the participants was 39.24\u2009\u00b1\u200911.92; 80.28% of them had a history of quit and 43.19% of them had a history of arrest and imprisonment. According to the results, 19.63% of the participants had suicidal ideation and 10.97% had a history of suicide attempt during their lifetime. The constructs of attitude, subjective norms, perceived behavioral control, and intent predicted suicidal ideation in the subjects. Intent and perceived behavioral control constructs were the strongest predictors of suicidal ideation, respectively. In general, the studied variables predicted 54.8% of suicidal ideation.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The structures of attitude, subjective norms and perceived behavioral control and intent predicted suicidal ideation in the drug addicts, so the theory of planned behavior will be a good framework for educational interventions to reduce suicide in them.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12888-021-03387-9","type":"journal-article","created":{"date-parts":[[2021,7,26]],"date-time":"2021-07-26T09:03:59Z","timestamp":1627290239000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Factors associated with suicidal ideation in drug addicts based on the theory of planned behavior"],"prefix":"10.1186","volume":"21","author":[{"given":"Ali","family":"Khani Jeihooni","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mehdi","family":"Amirkhani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tayebeh","family":"Rakhshani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pooyan Afzali","family":"Hasirini","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hanieh","family":"Jormand","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,7,26]]},"reference":[{"key":"3387_CR1","volume-title":"Systematic review of researches on suicide and suicide attempt in Iran","author":"S Ghoreyshi","year":"2008","unstructured":"Ghoreyshi S, Mousavinasab S. 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