Advanced aging- Young adults rarely experience Parkinson’s disease. It usually demonstrates itself in the middle to late years of life. The risk continues to increase the older one gets. Investigators assume that people with Parkinson’s have neural damage from genetic or ecological factors that get worse as they age. People usually develop the disease around age 60 or older.
Heredity- Having a close relative with Parkinson’s Disease increases the chances that you’ll develop the disease. However, your risks are still small unless you have many relatives in your family with Parkinson’s disease.
Sex- Men are more likely to get Parkinson’s than women. Potential reasons for this may be that males have larger exposure to other risk factors such as toxin exposure or head trauma. It has been hypothesized that oestrogen may have neuro-protective effects OR in the case of hereditary predisposition, a gene predisposing someone to Parkinson’s may be linked to the X chromosome.