{"id":"W2290632612","doi":"10.1136/bjsports-2015-095103","title":"Policy change eliminating body checking in non-elite ice hockey leads to a threefold reduction in injury and concussion risk in 11- and 12-year-old players","year":2015,"lang":"en","type":"article","venue":"British Journal of Sports Medicine","topic":"Traumatic Brain Injury Research","field":"Medicine","cited_by":106,"is_retracted":false,"has_abstract":true,"ca_institutions":"Alberta Children's Hospital; York University; University of Calgary","funders":"Canadian Institutes of Health Research","keywords":"Concussion; Ice hockey; Rate ratio; Poisson regression; Elite; Injury prevention; Poison control; League; Medicine; Physical therapy; Relative risk; Demography; Physical medicine and rehabilitation; Confidence interval; Emergency medicine; Internal medicine; Population; Environmental health","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.004439544,0.0001843623,0.0007469456,0.001519915,0.00004080866,0.00002718209,0.0001005036,0.000152691,0.00001882709],"category_scores_gemma":[0.002000082,0.0001744159,0.00003077973,0.0008403587,0.0001730525,0.0003183378,0.00007965852,0.0009619082,6.703664e-7],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0003459798,"about_ca_system_score_gemma":0.0001970054,"about_ca_topic_candidate":true,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00882733,"about_ca_topic_score_gemma":0.0006015452,"domain_scores_codex":[0.9972278,0.00009813529,0.001038146,0.0002985306,0.0008950802,0.0004423152],"domain_scores_gemma":[0.9986254,0.00008565339,0.0003831822,0.0001501486,0.0001983366,0.0005572916],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0009483001,0.0001081016,0.5232524,0.0001878738,0.00001126942,0.002364933,0.008004225,0.000003609951,0.001294491,0.00001937461,0.0007353593,0.4630701],"study_design_scores_gemma":[0.007313944,0.0007531038,0.9594234,0.0217472,0.00003204416,0.004323279,0.005726682,0.0001596268,0.0001242586,0.0001606404,0.00009165355,0.0001441126],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9919234,0.002204922,0.00001157547,0.004667256,0.0001913455,0.0006233527,0.000004770551,0.000009270051,0.0003641416],"genre_scores_gemma":[0.9933315,0.00471452,0.0005608482,0.0003624388,0.0008871178,0.00001324341,0.000004940497,0.00003309927,0.0000922826],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.462926,"threshold_uncertainty_score":0.997773,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.04902829711897189,"score_gpt":0.3444943203043008,"score_spread":0.2954660231853289,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}