{"doi":"10.1093/pm/pnaf067","title":"Psychometric properties of the knee osteoarthritis pain index","abstract":"OBJECTIVES: The current study sought to evaluate the psychometric properties of a newly developed Knee OsteoArthritis Pain Index (KOAPI), derived from the Brief Pain Inventory (BPI), among individuals with knee osteoarthritis (KOA). METHODS: This study consisted of secondary data analysis of two clinical trials. In study 1, 241 individuals with KOA were evaluated before total knee arthroplasty and six months post-surgery. In study 2, 37 individuals with KOA participated in a randomized, double-blind, placebo controlled, two-way crossover study in which they received either a COX-2 inhibitor followed by a placebo or a placebo followed by a COX-2 inhibitor. The KOAPI was derived from the BPI and included three BPI pain severity items (worst, average, current) and the BPI pain interference item related to pain when walking. RESULTS: The KOAPI showed excellent model fit (CFI = 0.99; TFI: 0.98-0.99; RMSEA: 0.08-0.001), good reliability (Cronbach's alpha: 0.84-0.87) and high convergent validity with the Western Ontario and McMaster Universities Osteoarthritis Index (r = 0.66; 95% CI: 0.44, 0.81) and the Pain Catastrophizing Scale (r = 0.50; 95% CI: 0.39, 0.60). CONCLUSIONS: Overall, the psychometric properties of the KOAPI were comparable or better than those produced by the original BPI pain severity subscale. The KOAPI may be a helpful screening and outcome measure for individuals with KOA that more closely captures symptoms which drive patients to seek clinical care.","journal":"Pain Medicine","year":2025,"id":552927,"datarank":0.16479184330021646,"base_score":1.0986122886681096,"endowment":1.0986122886681096,"self_citation_contribution":0.16479184330021646,"citation_network_contribution":0.0,"self_endowment_contribution":0.16479184330021646,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":2,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.8567,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1247852,"name":"Timothy R. Fleagle","orcid":"0009-0008-5378-9224","position":1,"is_corresponding":false},{"id":1153610,"name":"Elena D. Staguhn","orcid":"0000-0003-0620-0276","position":2,"is_corresponding":false},{"id":305712,"name":"Daniel O. Scharfstein","orcid":"0000-0001-7482-9653","position":3,"is_corresponding":false},{"id":326508,"name":"Rachel V. Aaron","orcid":"0000-0002-2182-8566","position":4,"is_corresponding":false},{"id":242821,"name":"Steven P. Cohen","orcid":"0000-0001-5928-2127","position":5,"is_corresponding":false},{"id":402034,"name":"Robert W. Hurley","orcid":"0000-0001-6591-9390","position":6,"is_corresponding":false},{"id":250036,"name":"Srinivasa N. Raja","orcid":"0000-0001-7991-7636","position":7,"is_corresponding":false},{"id":369594,"name":"Jennifer A. Haythornthwaite","orcid":"0000-0002-5924-7580","position":8,"is_corresponding":false},{"id":503312,"name":"Lauren Allen","orcid":"0000-0002-8097-4555","position":9,"is_corresponding":false},{"id":226954,"name":"Robert R. Edwards","orcid":"0000-0003-4873-0443","position":10,"is_corresponding":false},{"id":990983,"name":"Lars Arendt‐Nielsen","orcid":"0000-0003-0892-1579","position":11,"is_corresponding":false},{"id":492540,"name":"Claudia M. Campbell","orcid":"0000-0002-5420-4207","position":12,"is_corresponding":false},{"id":389800,"name":"Renan C. Castillo","orcid":null,"position":13,"is_corresponding":false},{"id":738372,"name":"Scott G. Ravyts","orcid":"0009-0008-0958-0802","position":0,"is_corresponding":true}],"reference_count":31,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-07-19T02:54:37.527189Z","pmid":"40418215","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":[]}