My mother is having parkinsons disease as well as she is diabetic. Recently she has started behaving abnormal during evening times. I had been to neurologist. He informed us that she is under dementia due to parkinsons and has advised quetipine tablets. Also note that my mother has urine leakage problem. I suspect that there should be Urinary infection. Since two days we have not been able to collect urine sample to check for urinary infection. I read an article that ther is link between UTI and dementia. How to come to conclusion that dementia is due to UTI or parkinsons? Please advise.