Yes, that's a serious ux issue in modern test results. Instead of just a range there needs to be some kind of variance score. It can be presented simply like, 10% out of range, or, 20x lower than normal. Hell, even just a second range that says "critical, seek medical attention". Then you can judge how close to that line is worth going for. There just should be more information. It's all computers nowadays anyways, they could print thousands of words, send me a video explanation, they could do anything!