4.7 Article

Association of immunosuppression treatment with generalization among patients with ocular myasthenia gravis: A propensity score analysis

Journal

EUROPEAN JOURNAL OF NEUROLOGY
Volume 29, Issue 6, Pages 1805-1814

Publisher

WILEY
DOI: 10.1111/ene.15292

Keywords

generalization; generalized myasthenia gravis; immunosuppression treatment; ocular myasthenia gravis; propensity score analysis

Funding

  1. National Natural Science Foundation of China [81671233]
  2. Youth Talent Support Program of Tangdu Hospital
  3. National Key Research and Development Program [2017YFC0907705]
  4. discipline innovation and development plan of Tangdu Hospital major program of clinical research [2021LCYJ002]

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This study found that immunosuppression significantly reduced the risk of disease generalization in patients with ocular myasthenia gravis over a 2-year period. Longer duration of immunosuppression and combination therapy with steroids and non-steroidal immunosuppressants showed even better efficacy in reducing the risk of disease generalization.
Background To analyze disease generalization in patients with ocular myasthenia gravis (OMG) treated with immunosuppression compared with patients without immunosuppression treatment. Methods In this retrospective cohort study, we analyzed data from patients with OMG at seven medical centers in China from January 1, 2015 to May 1, 2019 and compared disease generalization in patients (treated with immunosuppression vs. not treated) within 2 years of disease onset using raw and inverse probability of treatment weighting (IPTW) analyses. Results In the study population of 813 patients with OMG, 425 (52.3%) with immunosuppression had a mean (SD) onset age of 50.0 (15.1) years, and 188 (44.2%) were women. The remaining 388 (47.7%) patients were not immunosuppressed (mean age, 48.4 [15.0] years; 185 [47.7%] women). Disease generalization developed in 122 (31.4%) and 37 (8.7%) patients in the non-immunosuppression and immunosuppression groups, respectively. Relative to non-immunosuppression, immunosuppression was associated with a lower risk of generalization in a multivariable-adjusted Cox model (hazard ratio [HR] 0.27; 95% confidence interval [CI] 0.18-0.40; p < 0.001) and IPTW-weighted Cox model (HR 0.28; 95% CI 0.19-0.42; p < 0.001). In sensitivity analyses, longer duration of immunosuppression was associated with a lower risk of generalization (HR 0.90 for every 1-month increase; 95% CI 0.87-0.92; p < 0.001; IPTW-adjusted). Combination therapy with steroids and non-steroidal immunosuppressants showed superior efficacy in reducing the risk of generalization (HR 0.14; 95% CI 0.07-0.26; p < 0.001). Conclusion Immunosuppression significantly reduced the 2-year risk of generalization in patients with OMG.

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