Table 2.

Categories and Frequencies of Narrative Comments provided by 23 respondents

Comment Category	Frequency
Want more information about the trial in the CTA or via a link	43%
Increase the specificity of the CTA	13%
Generally positive comment	13%
Present the CTA at only one encounter per patient, then never again	9%
Simplify the onscreen interface	4%
Provide ability to opt-out	4%
Prefer a passive notification (i.e. not pop-up)	4%
Concerned about being overloaded by many alerts	4%
Disagree with the approach of recruiting patients at the point-of-care	4%