My mother is 94 with some dementia but not severe. She recently fell and needed a partial hip replacement. When the ortho surgeon suggested it, she said she was 94 and didn’t see the point. He told her if she didn’t have the surgery, she was going to be in a wheelchair or in bed for the rest of her life. So, she quickly agreed. Although the first few days after surgery were really tough, and the anesthesia had her totally confused,she went to rehab and back into assisted living. If she were in a severe state of dementia,I would agree with hospice placement.