{"id":"W4375856269","doi":"10.1093/cid/ciad287","title":"RETRACTED AND REPLACED: Real-World Effectiveness of Nirmatrelvir/Ritonavir on Coronavirus Disease 2019–Associated Hospitalization Prevention: A Population-based Cohort Study in the Province of Quebec, Canada","year":2023,"lang":"en","type":"article","venue":"Clinical Infectious Diseases","topic":"SARS-CoV-2 and COVID-19 Research","field":"Medicine","cited_by":26,"is_retracted":true,"has_abstract":true,"ca_institutions":"Centre Hospitalier Universitaire Sainte-Justine; Centre intégré universitaire de santé et de services sociaux de l'Est-de-l'Île-de-Montréal; Centre Intégré Universitaire de Santé et de Services Sociaux du Centre-Sud-de-l'Île-de-Montréal; Hôpital Maisonneuve-Rosemont; Centre intégré universitaire de santé et de services sociaux de la Mauricie-et-du-Centre-du-Québec; Montreal Clinical Research Institute; Université Laval; Centre Hospitalier de l’Université de Montréal; The Quebec Population Health Research Network; Centre intégré de santé et de services sociaux de Chaudière-Appalaches; Centre Intégré de Santé et Services Sociaux de Chaudière-Appalache; Université de Montréal; Institut National d'Excellence en Santé et en Services Sociaux","funders":"","keywords":"Medicine; Ritonavir; Pandemic; Cohort; Coronavirus disease 2019 (COVID-19); Coronavirus; Population; Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2); Cohort study; 2019-20 coronavirus outbreak; Virology; Disease; Environmental health; Human immunodeficiency virus (HIV); Internal medicine; Infectious disease (medical specialty); Outbreak; Antiretroviral therapy; Viral load","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":{"nature":"Retraction","reason":"Error in Data;Error in Results and/or Conclusions;Investigation by Journal/Publisher;Retract and Replace;","date":"10/29/2025 0:00","openalex_flagged":true},"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":["research_integrity"],"consensus_categories":[],"category_scores_codex":[0.00166458,0.0003936296,0.0005402623,0.0004549272,0.0009874066,0.001083753,0.001286459,0.0005990292,0.001352282],"category_scores_gemma":[0.003355982,0.0002378681,0.001252496,0.001186478,0.0005106005,0.0003729394,0.0003994721,0.0008303393,0.0001281516],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.01728227,"about_ca_system_score_gemma":0.01168387,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.9500449,"about_ca_topic_score_gemma":0.9643559,"domain_scores_codex":[0.9984022,0.0003386052,0.00008461054,0.0003385687,0.0003700729,0.0004660326],"domain_scores_gemma":[0.9970862,0.0002623607,0.001139606,0.0001982617,0.0006889618,0.0006245294],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0006009612,0.000110437,0.9943547,0.00003195962,0.0002679435,0.00005706036,0.0001441449,0.0002042238,0.0001277378,0.00002937986,0.0006711298,0.003400333],"study_design_scores_gemma":[0.00004729692,0.0001685077,0.9984907,0.00002473036,0.0001053847,0.00003300069,0.0001981473,0.0005387074,0.00003960407,0.000009568196,0.000335619,0.000008690432],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9961817,0.0009570304,0.00007575269,0.0002545372,0.00001831084,0.00003617336,0.001988231,0.00000564309,0.0004827155],"genre_scores_gemma":[0.9986669,0.0002048088,0.00007518717,0.0001031959,0.000007762666,0.00001013594,0.0006312201,0.00000246221,0.0002983581],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.999401,"threshold_uncertainty_score":0.1253923,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0370263418882441,"score_gpt":0.4076067047927497,"score_spread":0.3705803629045056,"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."}}