The overall goal of this study is to develop a platform for both large-scale chemoprevention trials and real-world chemoprevention studies for colorectal cancer (CRC) prevention. The specific objectives of this proof of concept study are to: 1. Evaluate the feasibility of a real-world chemoprevention agent (CPA) intervention (3-months of daily low-dose acetylsalicylic (ASA)) in participants at increased risk for CRC (one or more high-risk adenomas removed during colonoscopy) based on participant uptake, adherence (days taking CPA), and adverse events; 2. Evaluate factors related to uptake and adherence of ASA using validated surveys and interviews.
Study Design and Duration: This is a single arm (non-randomized), open-label prospective cohort pilot study. Screening Phase: up to 2 weeks Treatment Phase: 90 days Follow-up Phase: 90 days Screening Phase: up to 14 days. Participants will consent to being enrolled in the study and to the use of ASA for a 90 day period. Regardless of agreement to use ASA for the entire study period, all participants will complete 6 baseline questionnaires. Active Treatment Phase: up to 90 days. Participants that agree to the use of ASAs will be instructed to take daily ASAs for 90 days. Participants will be contacted by telephone at 1, 2, and 3 months to determine adverse events, adherence, and discontinuation. At 3 months participants will fill out a chemoprevention questionnaire and the Adherence Barriers Questionnaire (ABQ). Follow-up Phase: 90 days. During the follow-up phase, participants will not be provided with ASA through the study nor will a specific recommendation be made to continue ASA. All participants will be contacted via telephone at the end of this period to determine the prevalence of continued use of ASA on their own. Total study commitment will be up to 194 days. After consent, participants complete a 90 day active treatment phase followed by a 90 day follow-up phase. The trial is expected to be completed within one year.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE
Enrollment
100
acetylsalicylic acid delayed release tablets, 81mg taken once per day for 90 days
Forzani & Macphail Colon Cancer Screening Centre, University of Calgary
Calgary, Alberta, Canada
Uptake of ASA
Initiation of daily ASA 81mg (Percentage of participants who complete first 7 days of treatment).
Time frame: 7 days
Adherence to ASA over 90 days
Number of days taking ASA over a 90 day period. The time (number of days) on ASA for participants that discontinued use will be quantified.
Time frame: 90 days
Adherence to at least 50 percent of total prescribed dose
Percentage of participants who take at least 50 percent of total prescribed dose. Descriptive statistics will be utilized to characterize participants that adhered to ASA and participants who did not.
Time frame: 90 days
Measurement of Adverse Events
Measurement of Adverse Events reported through interviews with research study nurse and participant report over 90 days (active treatment phase).
Time frame: 90 days
Factors related to uptake and adherence to ASA
Behavioral, sociodemographic and health characteristics, measured using Health \& Lifestyle Questionnaire and presented as percentages.
Time frame: From enrollment to 90 days
Factors related to uptake and adherence to ASA using measurement of health related quality of life
Behavioral, sociodemographic and health characteristics, measured using Short-Form 36 Health Survey Questionnaire to measure quality of life and presented as percentages.
Time frame: At enrollment
Factors related to uptake and adherence to ASA using measurement of self efficacy
Behavioral, sociodemographic and health characteristics, measured using National Institutes of Health (NIH) Self-efficacy questionnaire and presented as percentages.
Time frame: At enrollment
Factors related to uptake and adherence to ASA
Measurement of beliefs, attitudes and values about medicines using Beliefs about Medicines questionnaire and expressed as percentages.
Time frame: At enrollment
Factors related to uptake, in-study adherence and post-study maintenance using measurement of adherence barriers
Measurement of Adherence barriers using Adherence Barriers Questionnaire (at baseline and 3m follow-up) and expressed as percentages.
Time frame: At enrollment through end of treatment at 90 days
Factors related to uptake, in-study adherence and post-study maintenance using measurement of chemoprevention knowledge
Measurement of knowledge about chemoprevention using Chemoprevention Questionnaires (baseline and 3m follow-up) and expressed as percentages.
Time frame: At enrollment through end of treatment at 90 days
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