{"id":"W3173126663","doi":"10.1136/tobaccocontrol-2020-056371","title":"Trends in e-cigarette brands, devices and the nicotine profile of products used by youth in England, Canada and the USA: 2017–2019","year":2021,"lang":"en","type":"article","venue":"Tobacco Control","topic":"Smoking Behavior and Cessation","field":"Medicine","cited_by":68,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Waterloo","funders":"Canadian Institutes of Health Research; National Cancer Institute; Public Health Agency of Canada","keywords":"Nicotine; Advertising; Electronic cigarette; Business; Tobacco control; Environmental health; Medicine; Psychiatry; Public health; Nursing","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":[0.0005238304,0.0001001975,0.0003464422,0.00004570358,0.0000332692,0.00001872902,0.00005548297,0.00004714643,0.00004012687],"category_scores_gemma":[0.0001557299,0.00005445728,0.00002116402,0.0002206393,0.0001063165,0.00004687798,0.00001825561,0.0001709254,9.709532e-8],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00002823831,"about_ca_system_score_gemma":0.0001602594,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.2327108,"about_ca_topic_score_gemma":0.6316232,"domain_scores_codex":[0.999058,0.0001542823,0.0002416466,0.0001850545,0.0002167723,0.000144238],"domain_scores_gemma":[0.9994069,0.0001936753,0.0000944957,0.000212392,0.00006317405,0.00002933367],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0007981255,0.00003270138,0.9924695,0.0000187201,0.00002635552,0.000006568012,0.001812414,0.000001147745,0.0003260336,0.00003519455,0.0004150813,0.004058196],"study_design_scores_gemma":[0.03782094,0.00002793864,0.9594809,0.000062365,0.0002153473,0.00001100937,0.0007016205,0.00003967685,0.001217921,0.000004364414,0.0003439794,0.000073895],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9915786,0.001589384,9.676348e-7,0.006140383,0.0000834802,0.0003574649,0.00006317852,0.000004173993,0.0001824089],"genre_scores_gemma":[0.9989085,0.00004581435,0.000001822825,0.000409277,0.00005382207,0.00002860167,0.00007406458,0.000007390353,0.0004707587],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.3989124,"threshold_uncertainty_score":0.7723986,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01281338580112727,"score_gpt":0.2379216989995028,"score_spread":0.2251083131983755,"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."}}