{"id":"W4414194571","doi":"10.2196/75887","title":"The Role of Physical Activity and Physical Function in Predicting Physical Frailty Transitions in Chinese Older Adults: Longitudinal Observational Study From CHARLS","year":2025,"lang":"en","type":"article","venue":"JMIR Aging","topic":"Frailty in Older Adults","field":"Medicine","cited_by":3,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Physical activity; Observational study; Longitudinal study; Baseline (sea); Muscle strength; Psychological intervention; Physical activity level; Frailty syndrome","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":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.002516219,0.0005866642,0.0005782664,0.001070597,0.001241414,0.0007591195,0.0008323487,0.0006978309,0.0008649531],"category_scores_gemma":[0.003110189,0.0004228982,0.00129661,0.001698602,0.0003533606,0.0006095524,0.001093682,0.001070589,0.0002003945],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001480583,"about_ca_system_score_gemma":0.00243301,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.09462076,"about_ca_topic_score_gemma":0.1179595,"domain_scores_codex":[0.9991665,0.0001542234,0.0001371644,0.000213321,0.0001564029,0.0001724399],"domain_scores_gemma":[0.9981669,0.000134193,0.0005158505,0.0002744659,0.000453829,0.0004547934],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00008437622,0.00003336338,0.9989385,0.00001473086,0.0001059465,0.00002506957,0.0001149248,0.00002991213,0.00007013237,0.00001208497,0.0001128652,0.0004580494],"study_design_scores_gemma":[0.000008596131,0.0000340394,0.9994686,0.000006692906,0.0000571753,0.00002169196,0.0001225954,0.0001616942,0.00001649383,0.0000112152,0.00008716188,0.000003981178],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9981501,0.0001966746,0.00009059718,0.00009150284,0.000006936646,0.0000274713,0.001236512,0.000003198298,0.0001970572],"genre_scores_gemma":[0.9980193,0.00009148849,0.0001001595,0.0000682521,0.000008347565,0.00005011688,0.001517509,0.00000165536,0.0001430821],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.09462076,"threshold_uncertainty_score":0.18814,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02249408832969304,"score_gpt":0.3254117263220724,"score_spread":0.3029176379923794,"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."}}