{"id":"W2026656096","doi":"10.1136/bmj.b5087","title":"Problem of immortal time bias in cohort studies: example using statins for preventing progression of diabetes","year":2010,"lang":"en","type":"article","venue":"BMJ","topic":"Advanced Causal Inference Techniques","field":"Mathematics","cited_by":1155,"is_retracted":false,"has_abstract":true,"ca_institutions":"Jewish General Hospital; Kingston Health Sciences Centre; McGill University; Queen's University","funders":"Canadian Institutes of Health Research","keywords":"Medicine; Diabetes mellitus; Cohort; Internal medicine; Endocrinology","routes":{"ca_aff":true,"ca_fund":true,"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":[0.1767487,0.00105577,0.003502779,0.002412648,0.001785391,0.003184696,0.002684435,0.008718506,0.00302433],"category_scores_gemma":[0.4338726,0.0009828607,0.004736546,0.003186682,0.007211768,0.006371436,0.003455001,0.01078721,0.000408807],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001534206,"about_ca_system_score_gemma":0.001900682,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.004728219,"about_ca_topic_score_gemma":0.003523619,"domain_scores_codex":[0.8743265,0.1105205,0.003619842,0.005941259,0.00478916,0.0008026496],"domain_scores_gemma":[0.3947338,0.5614565,0.01139445,0.02440605,0.007198845,0.0008102486],"domain_codex":null,"domain_gemma":"methods","domain_candidate":"methods","domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"theoretical_or_conceptual","study_design_scores_codex":[0.00220828,0.0002173703,0.04088666,0.003756139,0.006990506,0.003198452,0.003457029,0.02263799,0.001474362,0.7132538,0.02936157,0.1725578],"study_design_scores_gemma":[0.0006909545,0.0001969509,0.004038032,0.0006176957,0.001366454,0.001819618,0.0003058435,0.03141654,0.0007964139,0.9452678,0.01336219,0.0001214731],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":"theoretical_or_conceptual","genre_codex":"methods","genre_gemma":"methods","genre_scores_codex":[0.04118169,0.03044707,0.8060591,0.1096369,0.003328102,0.0004052757,0.001097638,0.0004744086,0.007369834],"genre_scores_gemma":[0.656632,0.01424389,0.2910028,0.02377501,0.006298621,0.0009157691,0.0004519772,0.0002846548,0.006395217],"genre_candidate":"methods","genre_consensus":"methods","teacher_disagreement_score":0.8232513,"threshold_uncertainty_score":0.9347477,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.2976455350419575,"score_gpt":0.5009101891130961,"score_spread":0.2032646540711386,"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."}}