Earlier quoted context omitted.
You're really blaming the subjects of a database for errors in that database? There are many reasons for errors that have nothing to do with anything a physician might or might not have done.
Those subjects fill out the forms that end up in the database. It isn't some faceless government agency reading their minds. The data comes from what the doctors write down.
It sounds as if the physicians are not using the database themselves. Why would they expend extra effort to ensure its accuracy? Data that must be accurate must be carefully curated, and that isn't free. When we expect others to do work to make our lives easy, we may be disappointed.