{"id":"W4405541825","doi":"10.1080/00224499.2024.2443011","title":"Earlier First Anal Sex Predicts Engagement in Chemsex Among Men Who Have Sex with Men in the United Kingdom","year":2024,"lang":"en","type":"article","venue":"The Journal of Sex Research","topic":"HIV/AIDS Research and Interventions","field":"Medicine","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"McGill University; McGill University Health Centre","funders":"Fonds de Recherche du Québec - Santé; University of Bristol; European Centre for Disease Prevention and Control; European Commission; Ministry of Health; ViiV Healthcare; London School of Hygiene and Tropical Medicine; Robert Koch Institut; University College London; Third Health Programme; Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology; Health Research; Gilead Sciences","keywords":"Men who have sex with men; Anal intercourse; Demography; Anal sex; Medicine; Homosexuality; Logistic regression; Public health; Psychology; Family medicine; Human immunodeficiency virus (HIV); Syphilis","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":[],"consensus_categories":[],"category_scores_codex":[0.0007437929,0.0002787316,0.0003970622,0.0004917165,0.0004262052,0.001623285,0.0003945369,0.0005441481,0.005473966],"category_scores_gemma":[0.005346561,0.0003302871,0.0007591441,0.0006224212,0.0003073024,0.0006672363,0.001295426,0.001122007,0.0007491765],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0006777492,"about_ca_system_score_gemma":0.000651024,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.06288327,"about_ca_topic_score_gemma":0.07093687,"domain_scores_codex":[0.99932,0.0001832788,0.0001112424,0.00009960012,0.0001353135,0.0001505411],"domain_scores_gemma":[0.9951687,0.0005634574,0.002721068,0.0001897559,0.0005032668,0.0008536683],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00002797863,0.00001914372,0.9982576,0.00001747538,0.00002336817,0.00007146794,0.0003133603,0.00002041346,0.00006133135,0.00001440564,0.0001412316,0.00103221],"study_design_scores_gemma":[0.00000163454,0.00002614742,0.9988171,0.00003925848,0.00001018605,0.0001316359,0.0006686948,0.00005873612,0.00002009565,0.000006456511,0.0002163686,0.000003798618],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9975169,0.0007707226,0.00004030308,0.0002633028,0.00001325341,0.000008422726,0.0003959321,0.00000348625,0.0009876711],"genre_scores_gemma":[0.9990636,0.0002892543,0.00004033922,0.00006240315,0.000006663322,0.000003723575,0.0002043313,0.000002015845,0.0003277721],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.06288327,"threshold_uncertainty_score":0.1250345,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.09744606765675014,"score_gpt":0.4055953903305126,"score_spread":0.3081493226737625,"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."}}