{"id":"W4255353872","doi":"10.2196/27248","title":"Polar Vantage and Oura Physical Activity and Sleep Trackers: Validation and Comparison Study","year":2022,"lang":"en","type":"article","venue":"JMIR Formative Research","topic":"Physical Activity and Health","field":"Medicine","cited_by":48,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"Universitetet i Tromsø","keywords":"Activity tracker; Physical activity; Energy expenditure; Heart rate monitor; Heart rate; Accelerometer; Polar; Medicine; Physical therapy; Psychology; Demography; Blood pressure; Internal medicine; Computer science; Physics","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":true,"about_ca":false,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0008371635,0.0001024878,0.0003405471,0.0001511625,0.000708824,0.00004998954,0.00004884221,0.00002590933,0.00001614409],"category_scores_gemma":[0.00003710027,0.00008696195,0.00002230119,0.000280212,0.0001799377,0.0003543184,0.0002999326,0.001057506,0.000005099002],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0001156697,"about_ca_system_score_gemma":0.00004796084,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.000204405,"about_ca_topic_score_gemma":0.00001283215,"domain_scores_codex":[0.9981014,0.0005760383,0.0001079735,0.0002374783,0.0006749991,0.0003021734],"domain_scores_gemma":[0.9991645,0.0003864121,0.00005085336,0.0001319544,0.00006583328,0.0002004791],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"qualitative","study_design_gemma":"observational","study_design_scores_codex":[0.006898576,0.0565626,0.1615611,0.002200015,0.0005489005,0.00007558193,0.3887593,0.00001071205,0.04841684,0.003742761,0.002349131,0.3288745],"study_design_scores_gemma":[0.003695152,0.01149721,0.9252015,0.00003255214,0.00004185272,0.0000338872,0.03383184,0.02002241,0.003644078,0.0009667643,0.0008431383,0.0001895724],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9969608,0.00005189807,0.00002215293,0.001512939,0.00001614764,0.001012231,0.0000331751,0.00002199803,0.000368721],"genre_scores_gemma":[0.9997056,0.00001419354,0.00001048028,0.00002214995,0.00006236062,0.0001277986,0.00001008422,0.000009412445,0.0000379109],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.7636404,"threshold_uncertainty_score":0.5451773,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.1393782991409792,"score_gpt":0.4948446831191355,"score_spread":0.3554663839781562,"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."}}