Treatment of hemorrhoids is divided by the cause of symptoms, into internal and external treatments. Accurately classifying a patient's symptoms and the relation of the symptoms to internal and external hemorrhoids is important.
Note also that the average life expectancy after being diagnosed with Parkinson's is about 9 years -- hence, those who participated were already at this point at the beginning of the study.
Most people have the first symptoms of Parkinson's disease after the age of 60 years, but Parkinson's disease also affects younger people. Early-onset Parkinson's disease strikes people around the age of 40 years, or even earlier.