RESULTS	Group A had a longer median disease duration than group B ( 0.5 vs 0.4 years , p = 0.016 ) , a higher mean DAS28 ( 6.1 vs 5.7 , p < 0.001 ) , more rheumatoid factor-positive patients ( 66 % vs 42 % , p < 0.001 ) and more patients with erosions ( 71 % vs 53 % , p < 0.001 ) .\