{"doi":"10.1002/alz.14470","title":"Performance of study partner reports in a non‐demented at‐risk sample","abstract":"INTRODUCTION: The Clinical Dementia Rating (CDR) Scale is a gold standard for staging impairment in Alzheimer's disease and other dementias (ADRD). The Quick Dementia Rating System (QDRS) offers similar results in 3 to 5 minutes without a trained clinician. This study aimed to (1) investigate concordance between comparably derived QDRS and CDR global scores, (2) examine item-level QDRS/CDR agreement, and (3) compare sample characteristics and cognitive performance across QDRS/CDR global concordant/discordant groups. METHODS: The study included 351 QDRS/CDR pairs from 297 participants in the Wisconsin Registry for Alzheimer's Prevention (WRAP). Analyses included descriptive indices of QDRS/CDR agreement, lasso logistic regression, tetrachoric correlations, and linear mixed models. RESULTS: The QDRS global/CDR global concordance rate is 70.66%. Memory item discrepancies were primarily responsible for QDRS/CDR global rating discordance. Average cognitive scores were highest in concordant-normal QDRS/CDR and lowest in concordant-abnormal QDRS/CDR. DISCUSSION: The QDRS effectively screened for impairment in this sample. Future analyses will investigate QDRS relations to ADRD biomarkers. HIGHLIGHTS: global and Clinical Dementia Rating (CDR) Scale global scores is 70.66%. Memory item discrepancies primarily cause QDRS/CDR global score discordance. Cognitive scores are associated with QDRS/CDR concordances/discordances. Future analyses will explore QDRS relations to ADRD biomarkers.","journal":"Alzheimer s & Dementia","year":2024,"id":456959,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":6,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.948,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2024-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":640216,"name":"Daniel M. Bolt","orcid":"0000-0001-7593-4439","position":1,"is_corresponding":false},{"id":289689,"name":"Erin M. Jonaitis","orcid":"0009-0004-5091-8255","position":2,"is_corresponding":false},{"id":289691,"name":"Bruce P. Hermann","orcid":"0000-0003-0133-4427","position":3,"is_corresponding":false},{"id":481605,"name":"Rachel Studer","orcid":"0000-0002-4321-6210","position":4,"is_corresponding":false},{"id":340627,"name":"Lianlian Du","orcid":null,"position":5,"is_corresponding":false},{"id":1282301,"name":"Brenda Ryther","orcid":null,"position":6,"is_corresponding":false},{"id":1282302,"name":"Lia Sparks","orcid":null,"position":7,"is_corresponding":false},{"id":108598,"name":"James E. Galvin","orcid":"0000-0001-5678-245X","position":8,"is_corresponding":false},{"id":230038,"name":"Sterling C. Johnson","orcid":"0000-0002-8501-545X","position":9,"is_corresponding":false},{"id":1019298,"name":"Rebecca Langhough","orcid":null,"position":10,"is_corresponding":false},{"id":1281802,"name":"Qi Huang","orcid":"0000-0003-2179-0892","position":0,"is_corresponding":true}],"reference_count":29,"raw_metadata":null,"created_at":"2026-07-19T02:03:32.516678Z","pmid":"39711292","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}