Around 500 at risk women, between the ages of 70 to 92, were tracked for five years - theirmentalcapacity was tested at the start and end of the study.
Analysis by 5 live Investigates suggests someone in Leicestershire is more than 40 times more likely to be deprived of their liberty using the safeguards in the MentalCapacity Act than someone in Tower Hamlets.
Patients were not able to make decisions relating to their care and regular reviews of people's mentalcapacity to consent to treatment had not taken place.