Researchers find evidence of a link between depression and Parkinson’s disease

A new study published in the journal Neurology suggests that people who are depressed have a higher risk for developing Parkinson’s disease. Those diagnosed with depression at an older age and those with depression that is more difficult to treat may be particularly impacted.

Researchers from the Taipei Veterans General Hospital reviewed the medical records of more than 23,000 patients over a 10-year period. Of this group, 4,463 patients had depression and 18,533 patients were in the control group. After adjusting for age and gender and ruling out patients with a diagnosis of depression within five years of being diagnosed with Parkinson’s, the researchers found that patients with depression were 3.24 times more likely to have developed Parkinson’s disease than those without depression.

The study, “Risk of Parkinson disease after depression,” was published online on October 2.