{"id":"W3011628489","doi":"10.1016/j.jtcvs.2020.02.123","title":"Commentary: Putting natural experiments in context","year":2020,"lang":"en","type":"letter","venue":"Journal of Thoracic and Cardiovascular Surgery","topic":"Cardiac Valve Diseases and Treatments","field":"Medicine","cited_by":0,"is_retracted":false,"has_abstract":false,"ca_institutions":"University of Ottawa","funders":"","keywords":"Medicine; Bicuspid aortic valve; Context (archaeology); Propensity score matching; Confounding; Natural history; Observational study; Internal medicine; Surgery; Aortic valve","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.01743525,0.00183671,0.003933927,0.001630738,0.0100555,0.01035972,0.005737703,0.165473,0.01201029],"category_scores_gemma":[0.1054989,0.001699101,0.002753425,0.001662698,0.01147329,0.00985656,0.005056653,0.1253518,0.01289241],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.008744434,"about_ca_system_score_gemma":0.01427634,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.01106656,"about_ca_topic_score_gemma":0.0165113,"domain_scores_codex":[0.981625,0.007315396,0.002105886,0.002629261,0.004259097,0.002065304],"domain_scores_gemma":[0.9277608,0.0520734,0.00326622,0.001805196,0.008955254,0.00613923],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"not_applicable","study_design_gemma":"not_applicable","study_design_scores_codex":[0.00004477768,0.00001375261,0.0001083946,0.00007137815,0.00002454541,0.0004570445,0.0001921167,0.00003060593,0.00006264789,0.002678701,0.9945362,0.001779982],"study_design_scores_gemma":[0.0002488225,0.00005702733,0.0005220986,0.0007942546,0.000101794,0.0008301309,0.0009582252,0.0003870956,0.0002301127,0.02988611,0.9658399,0.0001444554],"study_design_candidate":"not_applicable","study_design_consensus":"not_applicable","genre_codex":"commentary","genre_gemma":"commentary","genre_scores_codex":[0.00005871489,0.0004645054,0.00004593687,0.9700829,0.02854904,0.000005273069,0.00003183666,0.00001112001,0.0007506441],"genre_scores_gemma":[0.0006073852,0.0001795082,0.00008170932,0.9678705,0.03002656,0.0000198465,0.000008565157,0.00001086148,0.001195077],"genre_candidate":"commentary","genre_consensus":"commentary","teacher_disagreement_score":0.165473,"threshold_uncertainty_score":0.09220755,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02431420269745569,"score_gpt":0.3260362253691628,"score_spread":0.3017220226717071,"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."}}