They get the nurse to take the blood and it gets sent off to the lab. They then tick the boxes on the Qrisk algorhythm and call you in [in my husband's case] 'To discuss a statin' if the risk rises over 10%. He had said he wouldn't take one but I did suggest he listened to what the dr said so went along to listen in.
He is 83 so the risk is going to be high anyway. The first thing the dr said was that his risk is now 50% which makes him likely to have a stroke/heart attack in the next 10 years. I imagine that is quite likely given his age but it is of course only a 'risk'. However he is in good health, no heart problems, but he does have Myasthenia Gravis which is under control. He also has what I believe is called 'Essential shake' of his right hand and was prescribed a low dose of Atenolol for this some years ago. Prior to that he always had low blood pressure and still does. When the dr rolled out his reasons for taking a statin one of the reasons given was "Because you are on blood pressure medication". I know from my own Qrisk that the fact that you take BP meds will raise the risk, but when you are put on a beta blocker for another reason why should it be counted as if you have hypertension ? His BP incidentally on a very low dose of Atenolol, was 115/65. His cholesterol is 4.9 with a ratio of 3.3. and this also raised concern: "We like it to be below 4", just a number, never mind one's age.
On the advice of people on this site I had fetched his readings from the GP of his full blood count so was aware of the numbers. An exclamation mark was beside anything that was too high/low and a cause for concern. Certainly the GFR had an exclamation mark yet the dr never mentioned this.
Anyway the statin was refused whereupon the dr said actually were he 43 and not 83 it would have been a different story. It seems they are compelled by NICE to offer these things on pain of excommunication!