The mean age of AS patients was (35.0 ± 9.8) years.When the patients and control subjects were divided into different age groups (>40, 30-40, <30 years), the differences were not significantin terms of disease prevalence. The results also showed that the percentage of male patients is higher than that of females. There was no significant difference (P?0.05) between patients and controls in the distribution of males and females.Most of the patients had the disease for a period of 5 years or higher, with a disease severity of ? 2.1 and functional disability degree of I, II. The resultsshoweddifferent patterns of distribution for the three tested cytokines. A significant increase in the level of TNF-?, anon-significantincrease in the level of CXCL-8, and a significant decrease in the level of IL-10 were observed in the sera of patients with AS compared with the control.The patients also demonstrated significant decreases in the serum ALT and AST enzyme levels, hemoglobin (Hb) level, white blood cells (WBC) count, and erythrocyte sedimentation rate (ESR) (P?0.05).The percentage of HLA-B27-positive Iraqi patients was lower than that of the HLA-B27-negative patients. Some of these patterns were also exposed to changes related to some determinants in patients, which included age, sex, disease duration, disease severity, functional disability, and HLA-B27 positivity,along with association with clinical subtypes of AS.The area under the curve was determined for the parameters of ESR, IL-10, TNF-? and CXCL-8.The most significant factor was found to beESR, followed by IL-10, and then TNF-?, with the presence of significant differences, while there was no diagnostic significance for CXCL-8 ,which showed no significant difference (p?0.05).
