How do doctors make predictions of how long someone will live or if they’ll ever walk normally again?

Question

I was rewatching an old video on YouTube and the guy was able to walk again after 10 months of practicing yoga and losing 140 lbs. If no one on earth can exactly predict when someone will die or if they’ll be able to walk again, how and why do doctors come up with these predictions?

https://youtu.be/qX9FSZJu448

In: Mathematics

Answer 1

Well that’s what they are, predictions. Its a guess. Usually through some experience or research. Sometimes doctors are wrong. Sometimes weatherpeople.

Statistics are also used. Like, say if you break a certain bone then the chart would say that’s the bone that you need to walk.

Same with living. Like if someone is in a certain stage of cancer, they might live the predicted 4 weeks or they may pass away sooner. Or later. They also could be wrong and not have cancer.