From what I understand the factor exsits or does not exist it doesn't matter to what degree. Google Rheumatoid Arthirtis and go to tests and you can find out for sure. Hope this helps.

You can have a rheumatoid factor that is present but in the normal range.  You can also have no rheumatoid factor and still have rheumatoid arthritis.  The test is done in different ways, so it is very important to talk to your doctor and see what it means for you.  You can even just call your doctors office and ask them to explain the results to you, that shouldn't be a problem.  I have found a site for you though if you would like to know a little more about what a rheumatoid factor is and what it is used to determine.  Here it is:

http://www.healthcentral.com/rheumatoid-arthritis/c/53/15969/factor/

Good luck and best wishes!