Hi, being a UK resident and having had two knee replacement surgeries a Uni on the left knee and TKR on the right, I'm wondering what's the time frame difference between US and UK patients from the initial diagnosis to being in for surgery? My experience is in the UK, for osteoarthritis sufferers like myself it's around 18 months. There seems to be a set protocol that's followed, certain steps and treatments used before you are finally referred for surgery. That's been the case in both mine and my sister-in-law is currently going down the same route. Unless you can go private, this seems standard under the NHS. What's the time frame in the US? I realise you have a completely different system over there but a comparison will be interesting.