{"id":"W3210663063","doi":"10.1177/07487304211051841","title":"Diurnal Variation in SARS-CoV-2 PCR Test Results: Test Accuracy May Vary by Time of Day","year":2021,"lang":"en","type":"letter","venue":"Journal of Biological Rhythms","topic":"SARS-CoV-2 and COVID-19 Research","field":"Medicine","cited_by":28,"is_retracted":false,"has_abstract":true,"ca_institutions":"Health Sciences Centre; Institute for Clinical Evaluative Sciences; Sunnybrook Health Science Centre","funders":"National Institute of Allergy and Infectious Diseases; National Institute of General Medical Sciences; National Institute of Neurological Disorders and Stroke; National Institute of Mental Health","keywords":"Diurnal temperature variation; Asymptomatic; Medicine; Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2); Circadian rhythm; Time of day; Coronavirus disease 2019 (COVID-19); Vaccination; Demography; Biology; Internal medicine; Virology; Animal science; Infectious disease (medical specialty); Disease","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":[0.003334589,0.0001516018,0.0003732257,0.0003641204,0.0003142872,0.0006492179,0.0003714509,0.001291737,0.000921287],"category_scores_gemma":[0.02430998,0.0001199278,0.0001821655,0.0003800477,0.0004001437,0.0004522816,0.0001633147,0.0007387594,0.0007908473],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0005012536,"about_ca_system_score_gemma":0.0002229229,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.002104198,"about_ca_topic_score_gemma":0.002619122,"domain_scores_codex":[0.9967816,0.001429023,0.0004522747,0.0003550812,0.0007580065,0.0002240422],"domain_scores_gemma":[0.9827117,0.01155066,0.001962574,0.0008107804,0.002662956,0.0003013746],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0006302835,0.00009591579,0.8368272,0.0001499399,0.00006898976,0.004229423,0.001349116,0.0005853176,0.008180011,0.0004796739,0.03480867,0.1125954],"study_design_scores_gemma":[0.00005311497,0.000761943,0.916063,0.0001934523,0.00007219737,0.02867753,0.001641025,0.009400493,0.006578038,0.002388845,0.03409537,0.00007504231],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8089676,0.005475794,0.01168832,0.1481582,0.003189528,0.00008399113,0.0008048624,0.0004119767,0.02121978],"genre_scores_gemma":[0.972828,0.0006952201,0.001574347,0.02124942,0.00217424,0.00003391937,0.00009957277,0.00003944857,0.001305896],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.003334589,"threshold_uncertainty_score":0.01763517,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.06895277624447523,"score_gpt":0.3487743128009718,"score_spread":0.2798215365564966,"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."}}