What is a 'diagnostic tool', Was it something she found online, was it part of a health and fitness drive at a sports centre or at work? Who or what organisation drew up the 'DT'? Were they competent to do it? Why had it been drawn up? Was there a commercial organisation behind it? Did they have something to sell, either a test of eating plan/supplements.
There are so many questions that need to be asked before one can offer any advice.
I have sometimes completed some of the NHS online questionnaires where they tell me I am at risk of high blood pressure or high cholesterol, neither of which I currently have. It turns out that my only risk factor is my age! Something I can do nothing about and yes, the older you get the more likely your blood pressure or cholesterol will increase. I now treat these tests as if I read them in the Daily Mail.