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Research ArticleArticle

Incidence and Prevalence of Juvenile Systemic Lupus Erythematosus in Korea: Data From the 2017 National Health Claims Database

Sang Gyu Kwak, Sung-Hoon Park and Ji Yoon Kim
The Journal of Rheumatology May 2020, jrheum.191186; DOI: https://doi.org/10.3899/jrheum.191186
Sang Gyu Kwak
This work was supported by the research fund of Rheumatology Research Foundation (RRF-2017-03). S.G. Kwak, PhD, Department of Medical Statistics, Catholic University of Daegu School of Medicine; S.H. Park, MD, PhD, Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine; J.Y. Kim, MD, PhD Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Republic of Korea. Dr. S.G. Kwak and Dr. S.H. Park contributed equally as co–first authors. Address correspondence to Dr. J.Y. Kim, MD, PhD, Department of Pediatrics, Kyungpook National University Hospital, 130 Dongdeok-Ro, Jung-Gu, Daegu 41944, Republic of Korea. Email: phojyk@knu.ac.kr. Accepted for publication April 9, 2020.
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Sung-Hoon Park
This work was supported by the research fund of Rheumatology Research Foundation (RRF-2017-03). S.G. Kwak, PhD, Department of Medical Statistics, Catholic University of Daegu School of Medicine; S.H. Park, MD, PhD, Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine; J.Y. Kim, MD, PhD Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Republic of Korea. Dr. S.G. Kwak and Dr. S.H. Park contributed equally as co–first authors. Address correspondence to Dr. J.Y. Kim, MD, PhD, Department of Pediatrics, Kyungpook National University Hospital, 130 Dongdeok-Ro, Jung-Gu, Daegu 41944, Republic of Korea. Email: phojyk@knu.ac.kr. Accepted for publication April 9, 2020.
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Ji Yoon Kim
This work was supported by the research fund of Rheumatology Research Foundation (RRF-2017-03). S.G. Kwak, PhD, Department of Medical Statistics, Catholic University of Daegu School of Medicine; S.H. Park, MD, PhD, Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine; J.Y. Kim, MD, PhD Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Republic of Korea. Dr. S.G. Kwak and Dr. S.H. Park contributed equally as co–first authors. Address correspondence to Dr. J.Y. Kim, MD, PhD, Department of Pediatrics, Kyungpook National University Hospital, 130 Dongdeok-Ro, Jung-Gu, Daegu 41944, Republic of Korea. Email: phojyk@knu.ac.kr. Accepted for publication April 9, 2020.
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Abstract

Objective The purpose of the present study was to investigate the prevalence and incidence of juvenile systemic lupus erythematosus ( JSLE) in Korea.

Methods The data were collected from the National Health Insurance Claims Database of Korea. JSLE was identified using the diagnostic code M32 from the Korean Standard Classification of Diseases. Patients between 5 and 18 years old, who had at least 1 claim for JSLE from January 1, 2016, to December 31, 2017, as final diagnosis, were analyzed in the study. For prevalent cases, patients who used, at least 1 time, any type of medical services with a diagnostic code of M32 were selected. For incident cases, patients who did not use medical services with the M32 code 1 year prior and who were newly registered in 2017 were defined. Change-point analysis was used to find the age at which changes in prevalence and incidence occurred.

Results The prevalence of JSLE was 6.92 per 100,000 persons and the incidence of JSLE was 2.76 per 100,000 person-years in patients between 5 and 18 years old. The prevalence and incidence of JSLE were higher in females than in males. According to the change-point analysis, we found that the incidence and prevalence of female patients increased rapidly at the ages of 14 and 15 years, respectively.

Conclusion This Korean population-based epidemiological study of JSLE showed similar epidemiologic profiles to Asian population in other studies. The distribution of age, ethnicity, and pubertal status are important factors that influence population estimates of JSLE incidence and prevalence.

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Incidence and Prevalence of Juvenile Systemic Lupus Erythematosus in Korea: Data From the 2017 National Health Claims Database
Sang Gyu Kwak, Sung-Hoon Park, Ji Yoon Kim
The Journal of Rheumatology May 2020, jrheum.191186; DOI: 10.3899/jrheum.191186

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Incidence and Prevalence of Juvenile Systemic Lupus Erythematosus in Korea: Data From the 2017 National Health Claims Database
Sang Gyu Kwak, Sung-Hoon Park, Ji Yoon Kim
The Journal of Rheumatology May 2020, jrheum.191186; DOI: 10.3899/jrheum.191186
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