{"doi":"10.1371/journal.pone.0242802","title":"Self-harm in primary school-aged children: Prospective cohort study","abstract":"INTRODUCTION: No prospective studies have examined the prevalence, antecedents or concurrent characteristics associated with self-harm in non-treatment-seeking primary school-aged children. METHODS: In this cohort study from Melbourne, Australia we assessed 1239 children annually from age 8-9 years (wave 1) to 11-12 years (wave 4) on a range of health, social, educational and family measures. Past-year self-harm was assessed at wave 4. We estimated the prevalence of self-harm and used multivariable logistic regression to examine associations with concurrent and antecedent factors. RESULTS: 28 participants (3% of the 1059 with self-harm data; 18 girls [3%], 10 boys [2%]) reported self-harm at age 11-12 years. Antecedent (waves 1-3) predictors of self-harm were: persistent symptoms of depression (sex-age-socioeconomic status adjusted odds ratio [aOR]: 7.8; 95% confidence intervals [CI] 2.6 to 24) or anxiety (aOR: 5.1; 95%CI 2.1 to 12), frequent bullying victimisation (aOR: 24.6; 95%CI 3.8 to 158), and recent alcohol consumption (aOR: 2.9; 95%CI 1.2 to 7.1). Concurrent (wave 4) associations with self-harm were: having few friends (aOR: 8.7; 95%CI 3.2 to 24), poor emotional control (aOR: 4.2; 95%CI 1.9 to 9.6), antisocial behaviour (theft-aOR: 3.1; 95%CI 1.2 to 7.9; carrying a weapon-aOR: 6.9; 95%CI 3.1 to 15), and being in mid-puberty (aOR: 6.5; 95%CI 1.5 to 28) or late/post-puberty (aOR: 14.4; 95%CI 2.9 to 70). CONCLUSIONS: The focus of intervention efforts aimed at preventing and reducing adolescent self-harm should extend to primary school-aged children, with a focus on mental health and peer relationships during the pubertal transition.","journal":"PLoS ONE","year":2020,"id":101952,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":27,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.8616,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":498742,"name":"Lisa Mundy","orcid":"0000-0002-7983-5232","position":1,"is_corresponding":false},{"id":499907,"name":"Louise Canterford","orcid":null,"position":2,"is_corresponding":false},{"id":498743,"name":"Margarita Moreno‐Betancur","orcid":"0000-0002-8818-3125","position":3,"is_corresponding":false},{"id":105675,"name":"Paul Moran","orcid":"0000-0002-9257-8699","position":4,"is_corresponding":false},{"id":393230,"name":"Nicholas B. Allen","orcid":"0000-0002-1086-6639","position":5,"is_corresponding":false},{"id":498744,"name":"Russell Viner","orcid":"0000-0003-3047-2247","position":6,"is_corresponding":false},{"id":22455,"name":"Louisa Degenhardt","orcid":"0000-0002-8513-2218","position":7,"is_corresponding":false},{"id":498745,"name":"Silja Kosola","orcid":"0000-0002-2881-8299","position":8,"is_corresponding":false},{"id":499908,"name":"Izabela E. Fedyszyn","orcid":null,"position":9,"is_corresponding":false},{"id":48870,"name":"George Patton","orcid":"0000-0001-5039-8326","position":10,"is_corresponding":false},{"id":22405,"name":"Rohan Borschmann","orcid":"0000-0002-0365-7775","position":0,"is_corresponding":true}],"reference_count":49,"raw_metadata":null,"created_at":"2026-07-18T22:40:51.552773Z","pmid":"33253223","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}