S1 Appendix -

<div><p>Male urinary incontinence (UI) is most prevalent in older men, with one in three men aged 65 and above having problems maintaining continence. Addressing health inequalities, male-female disparities in continence services, and low health-seeking among men emphasizes the necessity for co-creating an intervention that empowers them to self-manage their UI. We aim to co-create a self-management intervention with an older men and Health care provider (HCP) group and assess its usability and/or acceptability among older men with UI. The intervention mapping (IM) framework, a co-creation strategy, will be used to co-create a self-management tool, followed by usability and/or acceptability testing. The study will be guided by the first four IM steps: the logic model of the problem, the logic model of change, program/intervention design, and program/intervention production, followed by preliminary testing. A participatory group of older men with UI recruited from an existing group of patient partners, and continence care experts will be involved in all steps of the IM process. Usability and/or acceptability testing will be conducted on a sample of 20 users recruited through seniors’ associations and retirement living facilities. After accessing the self-management tool for a week, participants will complete a product usability testing scale (aka System Usability Scale-SUS) and/or an acceptability test, depending on the preferred mode(s) of intervention delivery. Data will be analyzed using descriptive statistics. A benchmark overall mean usability score of 70 represents a good/usable product, based on the large database of SUS scores.</p></div>