@article{ATM17655,
author = {Roby Abraham and John J. Kelly and Jared M. Newman and Qais Naziri and Nipun Sodhi and Anton Khlopas and Jaiben George and Neil V. Shah and Assem A. Sultan and Morad Chughtai and John W. Barrington and Carl B. Paulino and Michael A. Mont},
title = {Have the annual trends of total knee arthroplasty in ankylosing spondylitis patients decreased?},
journal = {Annals of Translational Medicine},
volume = {5},
number = {Suppl 3},
year = {2017},
keywords = {},
abstract = {Background: Ankylosing spondylitis (AS) is characterized by osteoproliferation-induced structural damage and spinal inflammation, which lead to spinal deformity and functional disability. Though AS commonly affects the axial skeleton and sacroiliac joints, up to 70% of patients have involvement of the knees and other joints. Despite pharmacological efforts, advancing joint involvement may ultimately require surgical intervention. TKA is effective in managing patients with AS, yet it remains unclear whether or not the annual rates of TKA have been affected. Therefore, the purpose of this study was to evaluate the annual trends of AS patients who underwent TKA. Specifically, we evaluated: (I) the annual trends of TKAs due to AS in the United States population; (II) the annual trends in the proportion of TKAs due to AS in the United States.
Methods: The Nationwide Inpatient Sample (NIS) was used to identify all patients who underwent TKA between 2002 and 2013 (n=6,492,873). Then, a subsequent query was performed to identify TKA patients who had a diagnosis of AS, defined by the International Classification of Disease 9th revision diagnosis code 720.0. The incidence of TKAs with a diagnosis of AS in the United States was calculated using the United States population as the denominator. Regression models were used to analyze the annual trends of AS in patients who underwent TKA.
Results: During the study period, 2,986 patients who had AS who underwent TKA were identified. The annual number of TKAs with a diagnosis of AS increased by 168% from 125 to 335. After normalizing to the US population, the incidence of TKAs with AS increased from 0.58 to 1.38 TKAs per million US adults [IRR =1.08 (95% CI: 1.07–1.09), P},
issn = {2305-5847}, url = {https://atm.amegroups.org/article/view/17655}
}