{"doi":"10.1136/bmjopen-2019-034274","title":"Development of a Cannabis Assessment Tool (CAT-1) to measure current and lifetime marijuana use among older Veterans","abstract":"OBJECTIVE: To develop a tool to assess current (past 30 days) and lifetime marijuana use in older Veterans. SETTING: US Veteran's Affairs Healthcare System. PARTICIPANTS: 704 older Veterans were screened, 339 completed the initial survey, 100 completed the follow-up. PRIMARY OUTCOME MEASURE: Pearson's correlation coefficient to assess strength of association between initial and follow-up survey on measures of current and lifetime marijuana use. RESULTS: Both a 'gram-month' measure of marijuana smoked in the past 30 days (r=0.83) and a frequency-based measure assessing total number of times smoked in the past 30 days were reliable (r=0.89). Both a simple categorical measure of lifetime use (agreement=85%) and a continuous measure of lifetime use (r=0.82) were reliable. CONCLUSIONS: The Cannabis Assessment Tool offers a reliable assessment of past 30 days and lifetime assessments of smoking cannabis in older adults.","journal":"BMJ Open","year":2020,"id":107045,"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":0.9224,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":515213,"name":"Ann Abraham","orcid":"0000-0001-6941-7603","position":1,"is_corresponding":false},{"id":268901,"name":"Beth E. Cohen","orcid":"0000-0002-6166-0761","position":2,"is_corresponding":false},{"id":515841,"name":"Marzieh Vali","orcid":null,"position":3,"is_corresponding":false},{"id":515842,"name":"Sodahm R. Yoo","orcid":null,"position":4,"is_corresponding":false},{"id":515843,"name":"Camille Dollinger","orcid":null,"position":5,"is_corresponding":false},{"id":269662,"name":"Stacey Steigerwald","orcid":null,"position":6,"is_corresponding":false},{"id":268900,"name":"Salomeh Keyhani","orcid":"0000-0001-9124-9618","position":0,"is_corresponding":true}],"reference_count":17,"raw_metadata":null,"created_at":"2026-07-18T23:12:31.053776Z","pmid":"31941767","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":[]}