{"id":"W2808198565","doi":"10.1016/j.jtcvs.2018.04.119","title":"The limitations of observational data in assessing surgical left atrial appendage ligation","year":2018,"lang":"en","type":"letter","venue":"Journal of Thoracic and Cardiovascular Surgery","topic":"Atrial Fibrillation Management and Outcomes","field":"Medicine","cited_by":2,"is_retracted":false,"has_abstract":false,"ca_institutions":"Population Health Research Institute; McMaster University; Impact","funders":"","keywords":"Medicine; Appendage; Ligation; Observational study; Atrial Appendage; Cardiology; Internal medicine; Atrial fibrillation; Surgery; Anatomy","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":["metaresearch"],"consensus_categories":[],"category_scores_codex":[0.09512784,0.0003962551,0.001782323,0.001925982,0.001071925,0.003725903,0.002568553,0.002938668,0.002587766],"category_scores_gemma":[0.4497088,0.0005178136,0.000898821,0.004082525,0.001261651,0.003008618,0.001490026,0.00445388,0.0007417483],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001122039,"about_ca_system_score_gemma":0.002645513,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.006092167,"about_ca_topic_score_gemma":0.008077881,"domain_scores_codex":[0.8872191,0.06226368,0.03298024,0.005132656,0.01111586,0.001288461],"domain_scores_gemma":[0.4073689,0.4965126,0.04130379,0.01945796,0.03230585,0.003050976],"domain_codex":null,"domain_gemma":"methods","domain_candidate":"methods","domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"not_applicable","study_design_scores_codex":[0.000593485,0.0001856701,0.7783417,0.003414282,0.001966374,0.002895473,0.001688362,0.001329133,0.0003796817,0.008706742,0.08082338,0.1196759],"study_design_scores_gemma":[0.001383236,0.000999143,0.6018971,0.01650744,0.004352657,0.0315758,0.008602143,0.02519197,0.002180678,0.0946609,0.2121614,0.0004875221],"study_design_candidate":"not_applicable","study_design_consensus":null,"genre_codex":"commentary","genre_gemma":"commentary","genre_scores_codex":[0.2545376,0.07082719,0.07008161,0.5194193,0.03352735,0.001145087,0.0162738,0.0002207329,0.03396729],"genre_scores_gemma":[0.7961923,0.01440789,0.02744068,0.1242626,0.03352103,0.001149489,0.001985241,0.00007773058,0.0009630265],"genre_candidate":"commentary","genre_consensus":"commentary","teacher_disagreement_score":0.9048722,"threshold_uncertainty_score":0.5030901,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.2898070574814403,"score_gpt":0.3920618733337837,"score_spread":0.1022548158523435,"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."}}