Abstract
The study aimed to determine whether unique clinical patterns of AS may exist in China, specifically to explore the different clinical manifestations caused by gender, HLA-B27 status, and age at disease onset. The multicenter cross-sectional survey was conducted and 1251 patients were enrolled across China, representing a broad spectrum of Chinese AS patients. The mean age at onset and diagnosis were 29.2 (11.4) and 33.5 (12.6) years, respectively. The male/female ratio was 2.7:1. Acute anterior uveitis (AAU) was experienced in 10.3% of AS patients and 9.1% patients had juvenile-onset AS (JoAS). Men were significantly younger at onset and diagnosis and showed a higher frequency of HLA-B27 positivity, JoAS, and AAU than women. HLA-B27-positive patients had a younger age of onset than HLA-B27-negative patients. HLA-B27-positive patients were nearly three times as likely to develop AAU than negative patients (P = 0.04). JoAS patients had a family history of AS more often than adult-onset AS (AoAS) patients, and 4.9% of JoAS patients underwent surgical treatments, a rate more than six times that of AoAS patients (P = 0.01). Men had higher levels of C-reactive protein than women, as did HLA-B27 positives compared to negative patients, and JoAS compared to AoAS (all P < 0.05). The clinical patterns of our AS patients were similar to those in other studies in non-Chinese cohort: (1) the age at onset was 29.2 (11.4) years, which was older than found in other studies; (2) men were more likely be HLA-B27 carriers than women; and (3) AAU was less common in Chinese patients.
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Acknowledgments
The study was supported by research grants from the National Basic Research Program (2014CB541801), National Natural Science Foundation of China (31521003), US NIH NIAID U01 (1U01AI090909), International S&T Cooperation Program of China (2013DFA30870), and 111 Project (B13016). Computational support was provided by the High-End Computing Center located at Fudan University.
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Qian, Q., Xu, X., He, H. et al. Clinical patterns and characteristics of ankylosing spondylitis in China. Clin Rheumatol 36, 1561–1568 (2017). https://doi.org/10.1007/s10067-017-3660-3
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DOI: https://doi.org/10.1007/s10067-017-3660-3