{"id":"W4283837487","doi":"10.1136/bmj-2022-071502","title":"Effectiveness of a fourth dose of covid-19 mRNA vaccine against the omicron variant among long term care residents in Ontario, Canada: test negative design study","year":2022,"lang":"en","type":"article","venue":"BMJ","topic":"SARS-CoV-2 and COVID-19 Research","field":"Medicine","cited_by":149,"is_retracted":false,"has_abstract":true,"ca_institutions":"Impact; St Joseph's Health Centre; McMaster University; University Health Network; University of Toronto; Public Health Ontario","funders":"Agency for Healthcare Research and Quality","keywords":"Medicine; Confidence interval; Vaccination; Logistic regression; Coronavirus disease 2019 (COVID-19); Odds ratio; Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2); Vaccine efficacy; Internal medicine; Immunology; Disease; Infectious disease (medical specialty)","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":true,"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":[0.001927901,0.0005400476,0.0006624045,0.000192494,0.0004664053,0.0003824129,0.0008664812,0.0004867041,0.0006742204],"category_scores_gemma":[0.004370344,0.0002099774,0.0008673671,0.0002342142,0.0007851944,0.0001892663,0.0003288707,0.0004049086,0.00006469799],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.01264581,"about_ca_system_score_gemma":0.01209895,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.6112728,"about_ca_topic_score_gemma":0.6913204,"domain_scores_codex":[0.9985638,0.0005152781,0.00005631569,0.0001813152,0.0003725651,0.000310726],"domain_scores_gemma":[0.9969512,0.0007746789,0.001035603,0.0001197564,0.0004482223,0.0006705265],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.06389933,0.002151707,0.8669103,0.000706345,0.001829724,0.0002387795,0.0007770343,0.004539337,0.00589491,0.0001965372,0.001477121,0.05137894],"study_design_scores_gemma":[0.001982277,0.02780119,0.963887,0.00007479838,0.0007777315,0.0001063649,0.0002925963,0.002872965,0.001245734,0.00005029898,0.0008825074,0.00002663816],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9987789,0.000363737,0.0000865624,0.00008777768,0.000006198918,0.00006487677,0.0002160547,0.000004063016,0.0003918328],"genre_scores_gemma":[0.9991081,0.0001000714,0.0002194976,0.00006199835,0.000005330168,0.00005237326,0.0001626028,9.689977e-7,0.0002889981],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.3887272,"threshold_uncertainty_score":0.782033,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0359359704806243,"score_gpt":0.3338630878506268,"score_spread":0.2979271173700025,"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."}}