

At least some of that seems to be taken into account already:
The researchers also highlighted that the association was independent of underlying factors such as body mass index, hypertension, diabetes and lipid levels, which might predispose people to low-calorie products.
Still agree more research is needed.

I read it the other way around. For people with the same BMI for instance, h8gher blood xyliyol was linked to higher cardiovascular accidents.
In order to confirm, it would be better to check the article itself instead of this summary. It seems it is not published yet.