Can anyone offer any reassurance? Mum is 78 and had a FIT score of >200

Hi everyone, really hope someone can offer some words of reassurance or even some past experience. My mum is 78 and after a blood test it was recommended she have a FIT test, her score has come back as >200 as mentioned. Now she has already been diagnosed with diverticular disease or diverticulistis i can never remember which one. She is also on blood thinners.

She has had colonoscopy's in the past which have all come back ok, and the blood thinners are actually new since her most recent procedure which was around 13 years ago.

Really hope someone can offer some reassurance as going out of my mind with worry.

Thanks in advance.