A figure of 3 would have seen me getting attention about 8 years ago. Whether there would have been anything to find is another matter. I think that doctors as a breed are obviously very intelligent and are often born to similarly clever parents. They mix with similarly gifted people and for some this can lead to arrogance and a tendency to dismiss mere mortals. Being persistent is essential. I presented my 15 years of rising results in a graph which attracted his attention!Think the international consensus now is 'anything over 3' gets referred to hospital for further investigation.