1) ITs hard to say unless he gets to do a test on himself.
2) Certainly there is more risk in older age.
3) Also you need to keep in mind that I found from experience that doctors discriminate in age.
They dont understand exceptions to what they learn in medical school.
4) He would need to be vigilant with medical tests. and if need be improve health. It wont hurt to also see a good acupuncturist to improve your health systems.