[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"trial:NCT07699198":3,"trial-entities:NCT07699198":93,"trial-summary:NCT07699198":93},{"id":4,"nct_id":4,"org_study_id":5,"brief_title":6,"official_title":6,"overall_status":7,"completion_date":8,"status_verified_date":9,"last_update_date":10,"start_date":10,"sponsor_name":11,"lead_sponsor_class":12,"has_dmc":13,"brief_summary":14,"detailed_description":15,"conditions":16,"keywords":19,"study_type":24,"primary_purpose":25,"phases":26,"enrollment_info":28,"interventions":31,"primary_outcomes":82,"secondary_outcomes":87,"sex":91,"minimum_age":92,"maximum_age":93,"healthy_volunteers":94,"eligibility_criteria":95,"std_ages":103,"locations":106,"central_contacts":122,"overall_officials":124,"references":129,"see_also_links":130},"NCT07699198","24-1616","Developing and Strengthening Cannabis Warnings: Warning Message Testing","NOT_YET_RECRUITING","2026-11-30","2026-06","2026-07-13","University of North Carolina, Chapel Hill","OTHER",false,"The purpose of this activity is to identify promising cannabis warning messages from different themes. Participants will be adults who live in the United States, including both people who use cannabis and those who do not use cannabis. In an online within-subjects experiment, participants will be randomly assigned to view 7 cannabis warning messages from different themes developed as part of previous study activities. After viewing each cannabis warning message, participants will rate the message on awareness, clarity, believability, cognitive elaboration, perceived message effectiveness, and reactance. The survey will take 15-20 minutes.","The purpose of this activity is to identify promising cannabis warning messages from different themes.\n\nSetting: An online survey of adults who live in the United States.\n\nParticipants: An estimated N=1500 adults who live in the United States, including both people who use cannabis and those who do not use cannabis. Participants will be recruited by Qualtrics Services. Participants who are eligible for the study will view a consent form as part of the survey and check a box to indicate that they agree to participate in the study. Once the participant has completed consent, they will be able to begin the survey.\n\nProcedures: Participants will complete a within-subjects experiment in which they view and rate cannabis warning messages from different themes. Participants will be screened for inclusion and answer questions on demographic information and susceptibility to cannabis use. Participants will then be randomly assigned to view 7 cannabis warning messages from different themes developed as part of previous study activities. After viewing each cannabis warning message, participants will rate the message on awareness, clarity, believability, cognitive elaboration, perceived message effectiveness, and reactance. There will be a total of 11 warning themes plus control. After viewing and rating their assigned cannabis warning messages, participants will answer additional questions about cannabis risk perceptions and use behavior (if applicable), additional demographic information, and about their use of tobacco and alcohol. The survey will take 15-20 minutes.",[17,18],"Cannabis","Marijuana Use",[17,18,20,21,22,23],"Product Packaging","Product Labeling","Warnings","Health Communication","INTERVENTIONAL","PREVENTION",[27],"NA",{"count":29,"type":30},1500,"ESTIMATED",[32,38,42,46,50,54,58,62,66,70,74,78],{"type":33,"name":34,"description":35,"armGroupLabels":36},"BEHAVIORAL","Constituents","Participants will view and rate a message about constituents.",[37],"Cannabis warning messages",{"type":33,"name":39,"description":40,"armGroupLabels":41},"Cognitive Functioning","Participants will view and rate a message about cognitive functioning.",[37],{"type":33,"name":43,"description":44,"armGroupLabels":45},"Cardiovascular Health","Participants will view and rate a message about cardiovascular health.",[37],{"type":33,"name":47,"description":48,"armGroupLabels":49},"Motor Vehicle Crashes","Participants will view and rate a message about motor vehicle crashes.",[37],{"type":33,"name":51,"description":52,"armGroupLabels":53},"Dependence","Participants will view and rate a message about dependence.",[37],{"type":33,"name":55,"description":56,"armGroupLabels":57},"Psychosis and Schizophrenia","Participants will view and rate a message about psychosis and schizophrenia.",[37],{"type":33,"name":59,"description":60,"armGroupLabels":61},"Mental Health","Participants will view and rate a message about mental health.",[37],{"type":33,"name":63,"description":64,"armGroupLabels":65},"Reproductive Health","Participants will view and rate a message about reproductive health.",[37],{"type":33,"name":67,"description":68,"armGroupLabels":69},"Respiratory Health","Participants will view and rate a message about respiratory health.",[37],{"type":33,"name":71,"description":72,"armGroupLabels":73},"Edibles","Participants will view and rate a message about edibles.",[37],{"type":33,"name":75,"description":76,"armGroupLabels":77},"Cannabis Hyperemesis Syndrome","Participants will view and rate a message about cannabis hyperemesis syndrome.",[37],{"type":33,"name":79,"description":80,"armGroupLabels":81},"Control","Participants will view and rate a control message.",[37],[83],{"measure":84,"description":85,"timeFrame":86},"Cognitive Elaboration","A one item measure of cognitive elaboration to assess how much a message makes the participant think about the health risks of cannabis. Response options are on a 5-point scale from 5='A great deal' to 1= 'Not at all', with higher scores indicating higher cognitive elaboration.","Baseline (one time online survey)",[88],{"measure":89,"description":90,"timeFrame":86},"Perceived Message Effectiveness","This survey item assesses perceived message effectiveness in terms of how concerned the message makes the participant feel about the health effects of using cannabis. Response options are on a 5-point scale from 5='A great deal' to 1='Not at all' with higher scores indicating higher perceived message effectiveness.","ALL","18 Years",null,true,{"inclusion":96,"exclusion":99,"raw_text":102},[97,98],"Age 18 years of age and older","Live in the United States",[100,101],"Age less than 18 years of age","Does not live in the United States","Inclusion Criteria:\n\n* Age 18 years of age and older\n* Live in the United States\n\nExclusion Criteria:\n\n* Age less than 18 years of age\n* Does not live in the United States",[104,105],"ADULT","OLDER_ADULT",[107],{"facility":108,"city":109,"state":110,"zip":111,"country":112,"contacts":113,"geoPoint":119},"University of North Carolina at Chapel Hill","Chapel Hill","North Carolina","27514","United States",[114],{"name":115,"role":116,"phone":117,"email":118},"Sarah D Kowitt, PhD, MPH","CONTACT","919-974-4980","kowitt@unc.edu",{"lat":120,"lon":121},35.9132,-79.05584,[123],{"name":115,"role":116,"phone":117,"email":118},[125,127],{"name":115,"affiliation":11,"role":126},"PRINCIPAL_INVESTIGATOR",{"name":128,"affiliation":11,"role":126},"Leah M Ranney, PhD, MA",[],[]]