Body Mass Index Is Associated with Hip Arthritis in Patients with Ankylosing Spondylitis

Hyemin Jeong¹, Jiwon Hwang², Young Hee Eun¹, Eun-Jung Park³, Ji-Min Oh⁴, Hyungjin Kim⁵, Joong Kyong Ahn⁶, Jaejoon Lee¹, Chan Hong Jeon⁷, Eun-mi Koh⁸ and Hoon-Suk Cha⁹, ¹Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea, ²Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea, ³Department of Medicine, Jeju National University Hospital, Jeju University School of Medicine, Jeju, South Korea, ⁴Anyang SAM Hospital, Anyang, South Korea, ⁵Department of medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea, ⁶Department of Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea, ⁷Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, South Korea, ⁸Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea, ⁹Division of Rheumatology, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea

Meeting: 2015 ACR/ARHP Annual Meeting

Date of first publication: September 29, 2015

Keywords: Ankylosing spondylitis (AS), body mass and hip disorders

Session Information

Date: Monday, November 9, 2015

Title: Spondylarthropathies and Psoriatic Arthritis - Comorbidities and Treatment Poster II

Session Type: ACR Poster Session B

Session Time: 9:00AM-11:00AM

Background/Purpose:

To evaluate the clinical courses and associated factors of hip arthritis in patients with ankylosing spondylitis (AS).

Methods:

In this retrospective analysis, we evaluated 488 AS patients at a single tertiary hospital. Among the patients with hip arthritis in AS, radiographic hip arthritis was assessed using the Bath Ankylosing Spondylitis Radiology Hip Index (BASRI-h), and the average of the hip joint space width (interbone distance) at three distinct sites between the acetabulum and femoral head was recorded at baseline and the last visit at the outpatient clinic.

Results:

Among 488 patients with AS, 60 (12.3%) patients had hip arthritis. Body mass index (BMI) and erythrocyte sedimentation rate (ESR) were associated with hip involvement (OR 1.11, 95% CI 1.03 to 1.20, p = 0.005 and OR 1.01, 95% CI 1.00 to 1.02, p = 0.004, respectively). Long disease duration and advanced axial disease were associated with severe hip involvement (3≥BASRI-h) at baseline. BASRI-h and interbone distance did not change significantly in patients with hip involvement during the follow-up period of 81.4 ± 35.7 months. Five patients had hip joint replacement surgery during follow-up period. The BMI and initial BASRI-h were associated with joint replacement surgery (OR 1.29, 95% CI 1.01 to 1.65, p = 0.044 and OR 4.90, 95% CI 1.05 to 22.78, p = 0.043, respectively).

Conclusion:

Most of the patients with hip arthritis in AS showed no significant radiographic progression during the follow-up period. BMI was associated with hip arthritis in patients with AS.

Disclosure: H. Jeong, None; J. Hwang, None; Y. H. Eun, None; E. J. Park, None; J. M. Oh, None; H. Kim, None; J. K. Ahn, None; J. Lee, None; C. H. Jeon, None; E. M. Koh, None; H. S. Cha, None.

To cite this abstract in AMA style:

Jeong H, Hwang J, Eun YH, Park EJ, Oh JM, Kim H, Ahn JK, Lee J, Jeon CH, Koh EM, Cha HS. Body Mass Index Is Associated with Hip Arthritis in Patients with Ankylosing Spondylitis [abstract]. Arthritis Rheumatol. 2015; 67 (suppl 10). https://acrabstracts.org/abstract/body-mass-index-is-associated-with-hip-arthritis-in-patients-with-ankylosing-spondylitis/. Accessed .

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