TNF and enthesitis: In the AS group, 90% had lumbar pain; 77.5% had peripheral arthritis; 45% had anterior uveitis, 37.5% had enthesitis; 12.5% had coxalgia; 12.5% had dactylitis; 70.5% were HLA B27 positive; 32.5% were on treatment with sulphasalazine; 7.5% were on non-steroidal anti-inflammatory drugs and 7.5% on anti-TNF medications.