CRP and ankylosing spondylitis: At the onset of colitis, there were a long-term disease duration from 10 to 25 years (17.5 ± 6.5), high Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) 7.5 to 8.8 (8.2 ± 0.5), and elevated levels of ESR (35 to 80, 55.0 ± 18.7 mm/hr) and CRP (18.8 to 60.2, 34.4 ± 18.0 mg/L).