ABSTRACT
Objective To observe the clinical characteristics of ankylosing spondylitis (AS) patients with hyperuricemia (HUA), and to understand the correlation between AS and HUA, so as to improve the understanding of AS patients with HUA. Methods A retrospective analysis was carried out in patients with the diagnosis with AS from November 2012 to August 2016. Patients were divided into two groups based on complicated with and without HUA. The clinical manifestations, inflammatory indicators, imaging manifest-ations, treatment and outcomes of the two groups were statistically analyzed, and the follow-up results of some patients with HUA were analyzed. The chi-square test was used for the counting data. The measurement data in line with the normal distribution were tested by t test, and the measurement data in non-normal distribution were tested by Mann-Whitney U test. Results Three hundred and sixty-two patients with AS were collected, consisting of 288 males (79.6％) and 74 females (20.4％), aged from 14 to 72 years, a course of disease was 3 months to 40 years. There were 87 cases (24.0％) with hyperuricemia, 77 cases were male (88.5％, 21.3％of all AS patients), and 10 were female (11.5％, 2.8％ of all AS patients). Shorter morning stiffness time [(13 ±31) min and (22 ±48) min, Z=-2.231, P=0.026], lower IgM level [(1.4 ±1.3) g/L and (3.0 ±4.3) g/L, Z=-2.040, P=0.041], and lower erythrocyte sedimentation rate [(25±17) mm/1 h and (33±22) mm/1 h, t=-2.617, P=0.007] in the HUA group when compared with patients without HUA. The difference between the two groups was statistically significant. Four cases (4.6％) had gout arthritis in the group with HUA, all were male, blood uric acid level all>420 μmol/L. There were 7 cases (8.0％) of urolithiasis in the group with HUA, and 24 cases (8.7％) of urolithiasis in the group without HUA, but there was no statistically significant difference in the incidence of urolithiasis between the two groups. None developed hypertensive disease, heart disease, nephropathy, or diabetis. Conclusion The incidence of hyperuricemia is high in AS, and with lower disease activity, and fewer complications.