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Objective. To elucidate whether clinical features and the weighted genetic risk score (wGRS) were associated with the presence of lupus nephritis (LN). Methods. We retrospectively divided patients with systemic lupus erythematosus (SLE, n=1,078) into biopsy-proven LN (n=507) and non-LN groups (non-LN, n=571). Baseline clinical features, serologic markers, and the wGRS were collected. The wGRS was calculated from 112 non-human leukocyte antigen (non-HLA) loci and HLA-DRβ1 amino acid haplotypes for SLE. Associations among clinical features, wGRS, and the presence of LN were identified. Results. In the multivariate analysis, patients with LN were younger at diagnosis (odds ratio [OR]=0.97, p＜0.001), had more pleuritis (OR=2.44, p＜0.001) and pericarditis (OR=1.62, p=0.029), had a higher detection rate of anti-double stranded deoxyribonucleic acid (anti-dsDNA antibodies, OR=2.22, p＜0.001), anti-Smith antibodies (anti-Sm antibodies, OR=1.70, p=0.002), low level of complement (OR=1.37, p=0.043) and absence of antiphospholipid antibodies (aPL antibodies, OR=1.60, p=0.002), and had higher wGRS (OR=1.16, p=0.012). Mediation analysis suggested that anti-Sm antibodies and low complement could be mediators in the relationship between high wGRS and the presence of LN. Conclusion. Onset age, pleuritis, pericarditis, several serologic markers, and wGRS were associated with the presence of LN. Anti-Sm antibodies and low complement appeared to mediate the indirect relationship between wGRS and the presence of LN. (J Rheum Dis 2021;28:150-158)

Objective. To estimate the prevalence of non-adherence to rheumatoid arthritis (RA) medication and identify the associated factors for non-adherence in RA patients. Methods. Among the KORean Observational study Network for Arthritis 3,523 patients who completed a questionnaire about the adherence to RA medication were analyzed. The patients were divided into two groups: 1) adherent group, patients who skipped medication ≤5 days within the past 2 months; and 2) non-adherent group, patients who skipped ≥6 days of medication. The baseline characteristics were compared, and multivariable regression analysis was performed to identify the associated factors for non-adherence. Results. The non-adherent group had 339 patients (9.6%). The common causes of non-adherence were forgetfulness (45.8%), absence of RA symptoms (24.7%), and discomfort with RA medication (13.1%). Younger age (odds ratio [OR] 1.02, p＜0.01) and higher income (OR 1.70, p＜0.01) were associated with an increased risk of non-adherence. Whereas higher functional disability (OR 0.68, p＜0.01) and oral corticosteroid use (OR 0.73, p=0.02) were associated with a decreased risk of non-adherence. The associated factors differed according to cause of non-adherence. Having adverse events (OR 2.65, p=0.02) was associated with the risk of non-adherence due to discomfort with RA medication while a higher level of education (OR 2.37, p=0.03) was associated with the risk of non-adherence due to an absence of RA symptoms. Conclusion. The 9.6% of Korean RA patients were non-adherent to RA medication. The associated factors differed according to the cause of non-adherence. Therefore, an individualized approach will be needed to improve the adherence to RA medication. (J Rheum Dis 2018;25:47-57)

This research was supported by a grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HC15C3388).

Polymyositis (PM) is a subset of idiopathic inflammatory myopathies. The muscles involved with PM are typically proximal and distal limb muscles, but paraspinal muscles are rarely affected. The primary PM clinical symptom is gradual proximal muscle weakness but unusually abnormal trunk posture. Bent spine syndrome (BSS), also referred to camptocormia, is defined as an abnormal flexion of the trunk, appearing in standing position. An idiopathic axial myopathy is the most common cause of primary BSS. A few cases of inflammatory myopathy, a secondary BSS, have been reported. We describe a 59-year–old polymyositis patient with normal finding on an magnetic resonance imaging femur scan who presented with BSS only, myopathic findings on electromyography and elevation of muscle enzymes. (J Rheum Dis 2016;23:261-265)

Objective. To examine the impact of patient education (PE) on patients’ satisfaction in rheumatoid arthritis (RA) and to compare nurse-led education with medical doctor (MD)-led education. Methods. Patients were enrolled by categorizing in two groups, nurse-led and MD-led education, randomization was performed. Face-to-face education was conducted two times, and changes in patient satisfaction before and after PE were assessed using the visual analogue scale (VAS; 0 to100 mm) and patients’ satisfaction questionnaire (PSQ). Changes in patients’ reported outcomes (PRO) were measured using disease activity score with 28 joint-erythrocyte sedimentation rate (DAS28-ESR), health assessment questionnaire (HAQ), and European quality of life-5 dimension (EQ-5D). Changes in patients’ satisfaction and PRO between before and after PE were compared using paired t-test, and the comparison between nurse-led and MD-led education was analyzed using independent t-test. Results. A total of 120 patients, 60 patients from each group, were randomized to receive either nurse-led or MD-led education. Among them, 113 patients completely received education and final assessment. In total patients, patients’ satisfaction was significantly increased from 87.8±13.1 mm to 92.3±8.8 mm in VAS (p＜0.01), and from 3.7±0.4 to 4.0±0.4 in PSQ (p＜0.01). There was no improvement in DAS28-ESR, HAQ, but there was mild improvement in quality of life (QOL) after PE. Improvement of patients’ satisfaction by PSQ after nurse-led education was 0.4±0.4 and it was higher than 0.3±0.5 after MD-led education, but it was not statistically different (p=0.25). Conclusion. PE for RA patients improved patients’ satisfaction and QOL. Nurse-led education showed comparable improvement in patients’ satisfaction with MD-led education. (J Rheum Dis 2016;23:109-117)

Polyarthritis is a common manifestation of rheumatologic disorders; however, paraneoplastic arthropathies also arise as polyarthritis or polymyalgia, particularly in patients with myelomas, lymphomas, acute leukemia, and solid tumors. Because paraneoplastic syndromes, in some instances, might be manifested before a cancer diagnosis, they are difficult to diagnose and are often misdiagnosed. We experienced a 63-year-old female patient who had nonspecific arthritis on both hands and feet accompanied by fever. She had been diagnosed as rheumatoid arthritis and treated with prednisolone and disease modifying anti- rheumatic drugs (DMARDs) including methotrexate and anti-tumor necrosis factor agents. Her arthritis did not respond with anti-rheumatic treatment and diffuse large B-cell lymphoma was diagnosed by bone marrow biopsy. After 6 cycles of chemotherapy, her arthritis was improved as well as underlying lymphoma. (J Rheum Dis 2016;23:256-260)

Division of Rheumatology, Department of Internal Medicine, Keimyung University Donsan Medical Center, Daegu, Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Department of Radiology, Hanyang University Hospital for Rheumatic Diseases, Department of Pathology, Hanyang University Hospital, Division of Endoclinology, Department of Internal Medicine, Hanyang University Hospital, Department of Otolaryngology-Head and Neck Surgery, Hanyang University Hospital, YTS Rheumatology Clinic, Seoul, Korea