I waited about 21 months for my knee surgery (not knee replacement but that may be coming in the future) and it affected my hip
. Was tired of popping pain meds. I went to physio as well. It helped until strengthening let go. Still went for physio just for the Tens treatment 2 times a week for pain management for several months. After surgery I was pain free in my knee but still have that dull ache in my hip.
I had a friend that wasn't waiting anymore and went to USA and had both knee replacements done just over a year ago. He feels great. Cost him some money but was worth it he said. He will be turning 48 this summer.
My mother had hip replacement a few years ago. Took so long to get in it affected her knee, now she has been on the waiting list for close to 2 years for her knee replacement. Its frustrating for her at her age being restricted mobility wise and in pain. Cortisone shots have helped relive her pain right now but its not a good long term solution.