1-39 means you have a minimum of 1% and a max of 39%, not a jump from 1 to 39. My carotid ultrasound showed 1-15% on one side and 16-49% on the other. That was 4 years ago. A recent follow-up showed < 50% in both. The tech said that’s the new scoring and when he compared my current images to past there was little change. I have a friend who is a vascular surgeon and he told me most people in my age group (65-70) have some plaque in their arteries, I just happened to find out. Also I could have as little as 1% on one side and 15% on the other. He said it’s a poor way of scoring and hard to determine risk from that. He recommended
I step up my diet and exercise and stop worrying! Good luck to you😊