{"id":"W2980305927","doi":"10.1136/bmjopen-2019-030221","title":"Validation study of health administrative data algorithms to identify individuals experiencing homelessness and estimate population prevalence of homelessness in Ontario, Canada","year":2019,"lang":"en","type":"article","venue":"BMJ Open","topic":"Homelessness and Social Issues","field":"Health Professions","cited_by":63,"is_retracted":false,"has_abstract":true,"ca_institutions":"Institute for Clinical Evaluative Sciences; Public Health Ontario; University of Toronto; Western University; St. Michael's Hospital; Toronto Western Hospital","funders":"Schulich School of Medicine and Dentistry, Western University; Ontario Trillium Foundation; Ontario Ministry of Health and Long-Term Care; Schulich School of Medicine and Dentistry; Academic Medical Organization of Southwestern Ontario; Canadian Institutes of Health Research; Lawson Health Research Institute","keywords":"Medicine; Housing First; Population; Gerontology; Demography; Mental health; Environmental health; Psychiatry; Mental illness; Sociology","routes":{"ca_aff":true,"ca_fund":true,"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":[0.05231811,0.001099605,0.0008322527,0.002025656,0.001300154,0.002362306,0.002736315,0.0007920238,0.0007175099],"category_scores_gemma":[0.1286985,0.0006591857,0.001209561,0.00230371,0.001069957,0.0009499445,0.001324725,0.0009503433,0.0002715647],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.01931201,"about_ca_system_score_gemma":0.03200126,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.8785407,"about_ca_topic_score_gemma":0.8243017,"domain_scores_codex":[0.9828766,0.006398582,0.001979088,0.002207628,0.005574572,0.000963546],"domain_scores_gemma":[0.9053068,0.03419185,0.008350036,0.006191048,0.04444327,0.001517027],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0007101199,0.0001547698,0.9579086,0.0002258895,0.0006014723,0.00003508784,0.0005352555,0.007302191,0.0003322409,0.0003739264,0.003716424,0.02810405],"study_design_scores_gemma":[0.0006576599,0.0003576991,0.8540039,0.0002946865,0.0004907284,0.0001637171,0.000471066,0.1365851,0.001235921,0.0002644628,0.00541191,0.00006315745],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9545972,0.001668284,0.02280993,0.0008420474,0.00009992125,0.002869033,0.01195396,0.0007000889,0.004459516],"genre_scores_gemma":[0.9592692,0.0005326277,0.02502878,0.0003215453,0.00002380104,0.0006559902,0.01350771,0.00007912751,0.0005812152],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1214593,"threshold_uncertainty_score":0.2766879,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.2425704927578523,"score_gpt":0.543949465856612,"score_spread":0.3013789730987596,"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."}}