The risk was even higher for younger people, aged 25 to 44.
"Restoring the brain's ability to use insulin could potentially have a protective effect on the brain," said Thomas T. Warner, from Britain's University College London (UCL).
"It is possible that a link between Type-2 diabetes and Parkinson's could affect future diagnosis and treatment of these diseases," Warner added.
For the study, detailed in the journal Neurology, the team identified more than 2 million people who were admitted to the hospital for Type-2 diabetes for the first time.
They were then compared to more than 6 million people without diabetes who were admitted to the hospital for a range of minor medical and surgical procedures like sprains, varicose veins, appendectomy and hip replacement.
"Our study found a strong link between these two seemingly different diseases. Whether it is genetics that may play a role in the development of these diseases or they have similar pathways to development needs to be investigated further," Warner explained.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)