RESULTS	In 90 randomized patients at baseline , mean age ( standard deviation ) was 38.9 ( 11.8 ) years ; disease duration , 5.7 ( 8.1 ) years ; 59/90 ( 66 % ) were human leukocyte antigen-B27 positive ; 51/90 ( 57 % ) had radiographic sacroiliitis ; and 45/90 ( 50 % ) were magnetic resonance imaging sacroiliitis-positive .\