I have been monitoring my peak flow twice daily for the past few years and my personal best is around 360, and my lowest is 200. However, I recently had a spirometry/ lung function test in the hospital and the technician gave me a value of 5.8 for my PEF- how does this relate to the peak flow readings I am getting at home? I have looked online and can't find any information on this, only what my normal values should be on the home peak flow metre for my age and height ( around 420, which means my home readings are about right.) Perhaps some of you who have had lung function tests before can help with this? Do I need to convert the reading from the lung function test to get a corresponding reading to my home ones?