Obesity influences rheumatoid arthritis diagnostic tests Obesity causes patients to receive higher scores in blood tests used to diagnose rheumatoid arthritis even if they do not have the condition, researchers have warned. by David Millett Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up