Factors associated with discrepancies in disease activity as assessed by SDAI and RAPID3 in patients with rheumatoid arthritis: Data from a multicenter observational study (T-FLAG).

OBJECTIVES: The present study aimed to examine discrepancies between assessments based on Routine Assessment of Patient Index Data 3 (RAPID3) and Simple Disease Activity Index (SDAI) in RA patients with controlled disease activity. METHODS: Data from 464 RA patients in SDAI remission or low disease activity (REM/LDA) were analyzed. Patient-reported outcome (PRO) measures, including Health Assessment Questionnaire Disability Index (HAQ-DI), 25-question Geriatric Locomotive Function Scale (GLFS-25), and Kihon checklist (KCL), were assessed. Logistic regression models were used to identify factors associated with RAPID3 moderate or high disease activity (MDA/HDA). Cutoff values of RAPID3 MDA/HDA for each PRO evaluation item were determined using receiver operating characteristic curve analysis. RESULTS: Among RA patients in SDAI REM/LDA, 84.9% were in RAPID3 REM/LDA. Multivariable analysis revealed that HAQ-DI, GLFS-25, and KCL were independently associated with RAPID3 MDA/HDA. Subdomain analysis of KCL revealed that activities of daily living, physical function, cognitive function, and depressive mood were significantly associated with RAPID3 MDA/HDA. Cutoff values for HAQ-DI and KCL were 0.38 and 8, respectively. CONCLUSIONS: In RA patients with controlled disease activity, discrepancies between RAPID3 and SDAI assessments were observed, with factors such as HAQ-DI, GLFS-25, and KCL being independently associated with RAPID3 MDA/HDA.

A preliminary survey of rheumatologists on the management of late-onset rheumatoid arthritis in Japan.

Objectives We investigated the current perspectives regarding the management of late-onset rheumatoid arthritis (LORA) among rheumatologists in clinical practice. Methods This study was performed in October 2021, and included 65 rheumatologists certified by the Japan College of Rheumatology, who were administered questionnaires (including multiple choice and descriptive formulae) regarding the management of LORA. We aggregated and analyzed the responses. Results All 65 rheumatologists responded to the survey; 47 (72%) answered that >50% of newly diagnosed patients were aged ≥65 years, 42 (65%) answered that achievement of remission or low disease activity was the treatment goal, and 40 (62%) considered patient safety to be the highest priority. Most rheumatologists are concerned about the management of conditions other than RA, such as comorbidities, financial constraints, and life circumstances that interfere with standard or recommended treatment implementation. Conclusion This preliminary survey highlighted various rheumatologists' perspectives regarding the management of LORA.

Comparison of effectiveness of methotrexate in patients with late-onset versus younger-onset rheumatoid arthritis: Real-world data from an inception cohort in Japan (NICER-J).

OBJECTIVE: To compare the effectiveness of methotrexate (MTX) as initial therapy in patients with late-onset and younger-onset rheumatoid arthritis (LORA and YORA). METHODS: Of 114 patients with YORA and 96 patients with LORA, defined as RA occurring at ≥65 years of age, enrolled in a multicentre RA inception cohort study, 71 and 66 patients who had been followed up to 6 months after starting MTX treatment were included in this study. RESULTS: Proportions of patients on MTX treatment at 6 months were 96% and 92% in the YORA and LORA groups, respectively. Despite lower doses of MTX in the LORA group compared with the YORA group, no significant difference was observed in clinical disease activity index scores between the two groups throughout the follow-up period. The proportion of patients in clinical disease activity index remission at 6 months was 35% in both groups. Logistic regression analysis revealed that knee joint involvement and high Health Assessment Questionnaire-Disability Index were significant negative predictors of achieving clinical disease activity index remission at 6 months in the LORA group. CONCLUSION: Observations up to 6 months revealed that the effectiveness of MTX administered based on rheumatologist discretion in patients with LORA is comparable to that in patients with YORA in clinical settings.

Consensus statement on the management of late-onset rheumatoid arthritis.

OBJECTIVES: Late-onset rheumatoid arthritis (LORA), which has been increasing in recent years, lacks evidence for initial treatment. Japanese rheumatology experts recognized this gap and addressed it by developing consensus statements on the first clinical application of LORA. METHODS: These statements were created following an introductory discussion about treatment fundamentals, which included a review of existing literature and cohort data. The steering committee created a draft, which was refined using a modified Delphi method that involved panel members reaching a consensus. The panel made decisions based on input from geriatric experts, clinical epidemiologists, guideline developers, patient groups, and the LORA Research Subcommittee of the Japan College of Rheumatology. RESULTS: The consensus identified four established facts, three basic approaches, and six expert opinions for managing LORA. Methotrexate was recommended as the primary treatment, with molecular-targeted agents being considered if treatment goals cannot be achieved. An emphasis was placed on assessing the lives of older patients due to challenges in risk management and methotrexate accessibility caused by comorbidities or cognitive decline. CONCLUSIONS: The experts substantiated and refined 13 statements for the initial treatment of LORA. To validate these claims, the next is to conduct a registry study focusing on new LORA cases.

Association between laughter, frailty, and depression in rheumatoid arthritis patients.

OBJECTIVE: This study aimed to determine whether there are associations between laughter, disease activity, frailty, and depression in rheumatoid arthritis (RA) patients. METHODS: A total of 240 patients were included in this prospective cohort study on frailty in RA patients between March 2021 and June 2022. Patients were divided into the following four groups according to the frequency of laughter: "almost every day," "1-5 days per week," "1-3 days per month," and "never or almost never." Patient characteristics were compared among the four groups by analysis of variance. Factors associated with laughter were identified by multivariable logistic analysis. RESULTS: The mean 28-joint Disease Activity Score using CRP was 1.91, with 70.7% of patients in remission and 12.6% in low disease activity. For the "almost every day" (42.5% of patients), "1-5 days per week" (40.0%), "1-3 days per month" (11.3%), and "never or almost never" (6.3%) groups, scores of the Kihon Checklist (KCL) for assessing frailty status were 3.5, 4.6, 7.3, and 8.1 (p < .001), respectively, and scores of the Beck Depression Inventory (BDI-II) were 8.4, 10.7, 15.1, and 16.5 (p < .001), respectively. Multivariable analysis revealed that KCL (OR: 0.81, 95% CI: 0.73-0.90) and BDI-II (OR: 0.91, 95% CI: 0.86-0.95) scores were independently associated with the frequency of laughter. CONCLUSION: Frailty and depression were associated with laughter in RA patients with controlled disease activity. Interventions aimed at not only disease activity control but also frailty prevention may lead to a life filled with laughter.

Intervertebral fusion sites in patients with ankylosing spondylitis: A computed tomography study.

OBJECTIVES: To examine intervertebral fusion sites along the whole spine of patients with ankylosing spondylitis using computed tomography. METHODS: This retrospective study examined intervertebral fusion of five sites (anterior/posterior vertebrae, left/right zygapophyseal joints, and spinous process) on 23 vertebrae in the cervical, thoracic, and lumbar regions of the spine in 40 patients diagnosed with ankylosing spondylitis at our institute between January 2004 and December 2022. RESULTS: Mean age [± standard deviation (SD)] was 40.5 (± 17) years, and mean disease duration (± SD) was 11.4 (± 10.5) years at computed tomography evaluation; 55.9% were human leukocyte antigen B-27-positive. Fifteen (37.5%) patients showed intervertebral fusion in the thoracic and/or cervical regions, but not in the lumbar region. Fusion of posterior vertebrae was observed most frequently in the thoracic region, compared to the cervical and lumbar regions. In particular, more than half of the patients showed fusion of posterior vertebrae Th4-Th5 to Th7-Th8. CONCLUSIONS: In 37.5% of patients, intervertebral fusion was evident in the thoracic and/or cervical regions but not in the lumbar region. The most common site and region of intervertebral fusion were the posterior vertebrae of the middle thoracic region.

Well-controlled disease activity with drug treatment will not improve the frailty status of RA patients to robust state: A multicenter observational study (T-FLAG).

OBJECTIVES: To investigate a plateau in treatment enhancement for improving the frailty status of rheumatoid arthritis (RA) patients. METHODS: A total of 345 RA patients who were not robust in 2021 were assigned to the improved ("robust 2022," n = 51) and non-improved ("pre-frailty/frailty 2022," n = 294) groups. Factors associated with "robust 2022" were examined by logistic regression analysis. Patients were assigned to the stable (Follow-up mean DAS28-ESR in 2020 and 2021 < 3.2, n = 225) and unstable (≥3.2, n = 120) groups, which were further divided into the non-improved (stable: n = 180, unstable: n = 114) and improved (stable: n = 45, unstable: n = 6) groups. Factors influencing Japanese Cardiovascular Health Study (J-CHS) score were examined by multiple regression analysis. Changes over 2 years were compared between the non-improved and improved groups of the stable group. RESULTS: The associated factor of "robust 2022" was the follow-up meanDAS28-ESR in 2020 and 2021 < 3.2 (i.e., stable state) (OR: 4.01). Follow-up mean DAS28-ESR in 2020 and 2021 was associated with J-CHS score (T = 2.536, p = .013) only in the unstable group. In the stable group, HAQ-DI was lower (2020: 0.32 vs. 0.16; 2021: 0.32 vs. 0.17; 2022: 0.32 vs. 0.21), and the proportion of J-CHS: Q4 (weakness) was lower (2020: 48.4 vs. 17.8%; 2021: 55.0 vs. 29.2%; 2022: 50.4 vs. 0%), in the improved group than in the non-improved group, whereas both groups maintained clinical and functional remission over 2 years. CONCLUSIONS: Drug treatment to maintain well-controlled disease activity alone is insufficient for improving patients' frailty status after achieving treat-to-target goals, suggesting the need for multifaceted approaches.

Associations of frailty with RA-ILD and poor control of disease activity in patients with rheumatoid arthritis: A multi-center retrospective observational study.

BACKGROUND: This study aimed to investigate factors associated with frailty in rheumatoid arthritis (RA) patients. METHODS: A total of 656 RA patients were evaluated using data from an observational study in 2022. Among these patients, 152 with frailty were assigned to the frailty group, and 504 without frailty were assigned to the non-frailty group. Patient characteristics were compared between the two groups by univariate analysis, and factors associated with frailty were assessed by logistic regression analysis. Patient characteristics were also compared between patients with RA-associated interstitial lung disease (RA-ILD) (n = 102) and those without RA-ILD (n = 554). RESULTS: The frailty group was older (mean: 73.6 vs. 66.8 years) and had a higher DAS28-ESR (3.67 vs. 2.66), a higher HAQ-DI (1.13 vs. 0.32), and a higher rate of RA-ILD (25.0 vs. 12.7 %) than the non-frailty group. Age (OR: 1.03, 95 % CI: 1.01-1.05), HAQ-DI (3.22, 2.28-4.56), DAS28-ESR (1.44, 1.19-1.75), and RA-ILD (2.21, 1.24-3.94) were associated with frailty. RA patients with RA-ILD were older (73.3 vs. 67.5 years) and had a higher DAS28-ESR (3.30 vs. 2.80), a higher HAQ-DI (1.19 vs. 0.32), a higher proportion of frail patients (37.3 vs. 20.6 %), lower MTX use (26.5 vs. 62.9 %), and higher steroid use (44.1 vs. 26.8 %) than those without RA-ILD. CONCLUSIONS: Maintaining reasonable control of disease activity is necessary for RA patients, including those with RA-ILD, to recover from frailty.

Sacroiliac joint fusion in patients with ankylosing spondylitis is associated with hip involvement.

OBJECTIVE: Ankylosing spondylitis (AS) is a progressive inflammatory disease that affects the axial skeleton, and often associated with hip involvement. However, the causative factors for radiological hip involvement in patients with AS are not well characterized. This study aimed to investigate the factors associated with hip involvement in patients with AS. METHODS: Sixty-seven patients (134 hips) diagnosed with AS who qualified the modified New York criteria at our institution between January 2005 and June 2022 were enrolled. Patients were divided into two groups: the hip involvement group (BASRI-hip score ≥2 points) and the normal group (BASRI-hip score <2 points). Demographic, clinical and radiographic characteristics were compared between the two groups. RESULTS: Twenty-six patients (38.8%) had radiological hip involvement, of which 23 (88.5%) patients were male. There were significant between-group differences with respect to sacroiliac joint fusion, crossover sign, high centre edge angle and low sharp angle (P < 0.05). On logistic regression analysis, older age, sacroiliac joint fusion and pincer type were identified as independent risk factors for hip involvement. CONCLUSION: AS with hip involvement was significantly more likely to involve sacroiliac joint fusion, which suggested that mechanical stress in adjacent joints and reduced spinopelvic range of motion may influence hip involvement.

Relationship between frailty and methotrexate discontinuation due to adverse events in rheumatoid arthritis patients.

INTRODUCTION: Methotrexate (MTX) is an anchor drug in the treatment of rheumatoid arthritis (RA). Frailty is the intermediate condition between being healthy and disabled, and can lead to negative health outcomes. Adverse events (AEs) due to RA drugs are expected to be higher in frail patients. The present study aimed to investigate the relationship between frailty and MTX discontinuation due to AEs in RA patients. METHODS: Of 538 RA patients who visited us between June and August 2020 as part of the retrospective T-FLAG study, 323 used MTX. After 2 years of follow-up, we investigated AEs leading to MTX discontinuation. Frailty was defined as a Kihon Checklist (KCL) score ≥ 8. Cox proportional hazards regression analysis was performed to identify factors associated with MTX discontinuation due to AEs. RESULTS: Of the 323 RA patients (251 women, 77.7%) who used MTX, 24 (7.4%) discontinued MTX due to AEs during the 2-year follow-up period. Mean ages in the MTX continuation/discontinuation groups were 64.5 ± 13.9/68.5 ± 11.7 years (p = 0.169), Clinical Disease Activity Index was 5.6 ± 7.3/6.2 ± 6.0 (p = 0.695); KCL was 5.9 ± 4.1/9.0 ± 4.9 points (p < 0.001); and the proportion of frailty was 31.8%/58.3% (p = 0.012). MTX discontinuation due to AEs was significantly associated with frailty (hazard ratio 2.34, 95% confidence interval 1.02-5.37) even after adjusting for age and diabetes mellitus. AEs included liver dysfunction (25.0%), pneumonia (20.8%), and renal dysfunction (12.5%). CONCLUSIONS: Because frailty is a significant factor contributing to MTX discontinuation due to AEs, the latter should be carefully monitored in frail RA patients who use MTX. Key Points • Of the 323 rheumatoid arthritis (RA) patients (251 women, 77.7%) who used methotrexate (MTX), 24 (7.4%) discontinued MTX due to adverse events (AEs) during the 2-year follow-up period. • MTX discontinuation due to AEs was significantly associated with frailty (hazard ratio 2.34, 95% confidence interval 1.02-5.37) even after adjusting for age and diabetes mellitus, and neither the MTX dose, folic acid supplementation, nor GC co-therapy were factors in MTX discontinuation. • Frailty is a predominant factor in MTX discontinuation among established, long-term pretreated RA patients, and the occurrence of AEs due to MTX should be carefully monitored when frail RA patients use MTX.

Choice of and response to treatment in patients with early-diagnosed rheumatoid arthritis: Real-world data from an inception cohort in Japan (NICER-J).

OBJECTIVE: Various guidelines recommend that patients with early rheumatoid arthritis (RA) try to achieve clinical remission within 6 months, and early therapeutic intervention is important to this end. This study aimed to investigate short-term treatment outcomes of patients with early-diagnosed RA in clinical practice and to examine predictive factors for achieving remission. METHODS: Of the 210 patients enrolled in the multicenter RA inception cohort, 172 patients who were followed up to 6 months after treatment initiation (baseline) were included. Logistic regression analysis was used to examine the impact of baseline characteristics on achievement of Boolean remission at 6 months. RESULTS: Participants (mean age, 62 years) initiated treatment after a mean of 19 days from RA diagnosis. At baseline and 3 and 6 months after treatment initiation, proportions of patients using methotrexate (MTX) were 87.8%, 89.0%, and 88.3%, respectively, and rates of Boolean remission were 1.8%, 27.8%, and 34.5%, respectively. Multivariate analysis revealed that physician global assessment (PhGA) (Odds ratio (OR): 0.84, 95% confidence interval (CI): 0.71-0.99) and glucocorticoid use (OR: 0.26, 95% CI: 0.10-0.65) at baseline were independent factors that predicted Boolean remission at 6 months. CONCLUSION: After a diagnosis of RA, satisfactory therapeutic effects were achieved at 6 months after the initiation of treatment centered on MTX according to the treat to target strategy. PhGA and glucocorticoid use at treatment initiation are useful for predicting the achievement of treatment goals.

Periprosthetic humeral fracture revision using a massive allograft in a patient with rheumatoid arthritis: A case report.

Total elbow arthroplasty (TEA) is a surgical option for patients with rheumatoid arthritis (RA). Periprosthetic fractures during and after TEA are one of the most common causes of reoperation. Fractures around the stem of a loose prosthesis with associated bone loss are the most technically challenging to treat. Previous reports have demonstrated that the use of massive allografts is a reasonable alternative in salvage situations. Here, we report the case of a 78-year-old woman with RA who underwent revision TEA using massive allografts with modifications to the methods described in previous reports. She suffered a right periprosthetic humeral fracture 5 years after primary TEA, with a fracture in the proximal humeral diaphysis and a long spiral fracture in the diaphysis. The fracture around the stem of a loose prosthesis was associated with bone loss. We performed revision TEA using an allograft of the proximal femoral diaphysis. In contrast to previous reports, we preserved part of the humeral diaphysis, which was thin due to osteolysis, without removal. The advantage of this approach was that it preserved attachments, such as the deltoid and brachioradialis muscles. The patient had good elbow function and minimal pain without adverse events at 1 year postoperatively. Our findings suggest that preserving part of a thinned humeral diaphysis is a reasonable option in revision TEA with a massive composite allograft.

Effectiveness of tacrolimus concomitant with biological disease-modifying antirheumatic drugs in patients with rheumatoid arthritis.

OBJECTIVES: The study aimed to investigate the effectiveness and tolerance of biological disease-modifying antirheumatic drugs (bDMARDs) therapy administered concomitantly with tacrolimus (TAC) treatment in patients with rheumatoid arthritis. METHODS: 2792 patients who underwent therapy with five bDMARDs (etanercept: ETN, adalimumab, golimumab, tocilizumab, and abatacept: ABT) were enrolled. Among the study subjects, 1582 were concomitant methotrexate (MTX group), 147 were concomitant TAC (TAC group), and 1063 were non-concomitant MTX and TAC (non-MTX/TAC group). The primary outcome was the incident rate of discontinuation of bDMARDs by adverse events (AEs) or loss of efficacy. RESULTS: Concerning the analysis for each reasons of discontinuation, including AEs and loss of efficacy, the hazards ratio (HR) was significantly lower in the TAC group than in non-MTX/TAC groups (AEs: HR = 0.39, 95% confidence interval, 0.23-0.68, loss of efficacy: HR = 0.49, 95% confidence interval, 0.30-0.78). The loss of efficacy with the use of ETN and ABT was lower in the TAC group than in non-MTX/TAC groups. Concomitant TAC did not induce elevated risk for discontinuation of AEs in all bDMARD analyses. CONCLUSIONS: Concomitant TAC with ABT or ETN showed higher retention rates than bDMARDs therapy without TAC or MTX. AEs did not increase over long-term observation.

Factors associated with frailty in rheumatoid arthritis patients with decreased renal function.

OBJECTIVES: To investigate factors associated with frailty in rheumatoid arthritis (RA) patients with decreased renal function. METHODS: RA patients who visited outpatient clinics from June to August 2021 were included (N = 625). Patients with estimated glomerular filtration rate <60 ml/min/1.73 m2 were defined as having decreased renal function (N = 221) and divided into the non-frailty (N = 153) and frailty (N = 58) groups. Patient characteristics were compared between the two groups by univariate analysis. Significant factors in univariate analysis were assessed by logistic regression analysis to determine their association with frailty in patients with decreased renal function. RESULTS: Patients in the frailty group were older (74.0 vs.79.0 years) and had a longer duration of disease (11.1 vs. 17.8 years), higher Disease Activity Score erythrocyte sedimentation rate (DAS28-ESR; 2.99 vs. 3.80), higher Health Assessment Questionnaire Disability Index (0.42 vs. 1.43), and a lower rate of methotrexate (MTX) use (46.4% vs. 25.9) compared to those in the non-frailty group. Factors associated with frailty in patients with decreased renal function were age (odds ratio: 1.07), duration of disease (1.06), DAS28-ESR (1.85), and MTX use (0.42). CONCLUSIONS: Among factors associated with frailty in RA patients with decreased renal function, improving DAS28-ESR is likely to be the most feasible approach to promote recovery from frailty (200/200 words).

Increased prevalence of Staphylococcus aureus nasal carriage in rheumatoid arthritis patients with moderate/high disease activity.

BACKGROUND: Staphylococcus aureus (S. aureus) nasal carriage is a well-known risk factor for surgical site infection (SSI) after total joint arthroplasty. This study aimed to compare the prevalence of S. aureus nasal carriage between patients with osteoarthritis (OA), a degenerative joint disease, and those with rheumatoid arthritis (RA), a chronic autoimmune inflammatory disease, who underwent total joint arthroplasty, and to investigate the influence of RA disease activity on nasal carriage rate. METHODS: This retrospective study targeted 508 OA and 107 RA patients who underwent S. aureus nasal screening prior to primary total knee and/or hip arthroplasty. RA patients were divided into two groups based on disease activity: the remission/low disease activity (REM/LDA) group and the moderate/high disease activity (MDA/HDA) group. Factors associated with S. aureus nasal carriage were assessed with multivariate logistic regression models. RESULTS: Of all 615 patients, 155 (25%) carried S. aureus in their nares. Compared to OA patients, RA patients had a significantly higher rate of S. aureus nasal carriage (24% vs. 33%, p = 0.049). Compared to the REM/LDA group (n = 39), the MDA/HDA group (n = 58) had a significantly higher rate of S. aureus nasal carriage (21% vs. 41%, p = 0.032). Multivariate analysis revealed that the MDA/HDA group, but not the REM/LDA group, had a significantly higher odds of S. aureus nasal carriage compared to the OA group (odds ratio: 2.76, 95% confidence interval: 1.07-7.12). CONCLUSION: Preoperative nasal screening for S. aureus is beneficial, especially in RA patients with moderate/high disease activity.

Age and symptoms at onset of ankylosing spondylitis in Japanese patients.

OBJECTIVES: To examine the age at onset and initial symptoms as clinical features of ankylosing spondylitis in Japanese patients. METHODS: This retrospective study included 60 Japanese patients diagnosed with ankylosing spondylitis at our institute between January 2004 and June 2021. Initial symptoms were considered pain in axial joints and/or extra-axial joints. If a patient had initial symptoms at multiple sites, each site was counted. We assessed trends for the number of patients and sites of initial symptoms according to age at onset. RESULTS: Mean age (± standard deviation) at onset was 28.9 (± 14.3) years. Approximately one-third of patients experienced onset before age 20. The back was the most common site of initial symptoms (36.7%), followed by the hip (26.7%), knee (15%), buttocks (15%), neck (10%), finger (6.7%), shoulder (3.3%), and others (including overlapping sites). Thirty-two (53.3%) and 25 (41.7%) patients had initial symptoms only in axial joints and only in extra-axial joints, respectively. The proportion of patients with initial symptoms only in extra-axial joints significantly decreased with increasing age (p = .024). CONCLUSIONS: Sites of initial symptoms were frequently the back, hip, knee, and buttocks, and 41.7% had initial symptoms only in extra-axial joints. Younger onset patients frequently had extra-axial involvement.

Reasons and risk factors for discontinuation of treatment with any biological disease-modifying antirheumatic drugs in patients with rheumatoid arthritis: A long-term observational study.

OBJECTIVES: Patients with rheumatoid arthritis (RA) usually switch to a second biological disease-modifying antirheumatic drugs (bDMARDs) when the first has proven to be ineffective, although some may discontinue bDMARDs treatment altogether. We investigated the total rate of bDMARDs retention and the risk of bDMARDs discontinuation in patients with RA. METHODS: The study included 564 patients with RA who started bDMARDs treatment before 2008 (<65 years old, n = 413; ≥65, n = 151). The primary outcome was the incidence of bDMARDs discontinuation due to adverse events (AEs). Risk factors were examined using Fine and Gray regression models. RESULTS: Among 564 patients, 74 had discontinued bDMARDs treatment due to AEs. Male sex and Steinbrocker class 3-4 were more frequent, while rheumatoid factor and concomitant methotrexate treatment were less frequent, in those aged ≥65 years than in those aged <65 years, respectively. The subdistribution hazard ratio for discontinuation was significantly higher in the ≥65 group than in the <65 years group (hazard ratio = 3.53, 95% confidence interval = 2.07-6.03). Lack of concomitant treatment with MTX was risk factor for discontinuation in patients ≥65 years. Advanced Steinbrocker class was a risk factor in patients <65 years. CONCLUSIONS: Older patients are at higher risk of discontinuing bDMARDs treatment due to AEs than younger patients.

Validation of grip strength as a measure of frailty in rheumatoid arthritis.

Rheumatoid arthritis (RA) patients often exhibit finger/wrist joint symptoms and reduced grip strength. This study aimed to validate grip strength as a measure of frailty in RA patients. Subjects were 424 female RA patients (mean age ± standard deviation, 66.8 ± 14.5 years). Frailty was defined as a score of ≥ 8 points on the Kihon Checklist (KCL). Finger/wrist joint symptoms were defined based on tender or swollen joints. Associations between frailty and grip strength were determined using receiver operating characteristic (ROC) curve analysis and multivariable logistic regression analysis. There were 179 subjects with frailty (42.2%). Multivariable logistic regression analysis revealed that frailty was significantly associated with grip strength independently of finger/wrist joint symptoms. In ROC curves, cut-off scores of grip strength for frailty in subjects without and with finger/wrist joint symptoms were 17 kg (sensitivity, 62.1%; specificity, 69.0%) and 14 kg (sensitivity, 63.2%; specificity, 73.0%), respectively. The results of the present study suggest that grip strength in female RA patients is associated with frailty, with a cut-off score of 17 kg (equivalent to Cardiovascular Health Study criteria, < 18 kg) when RA patients have no finger/wrist joint symptoms. However, when RA patients have finger/wrist joint symptoms, it may be considered to reduce the cut-off score of grip strength.

Disease activity at baseline is an independent predictor of frailty at one year in pre-frail patients with rheumatoid arthritis; a multicenter retrospective observational study.

OBJECTIVES: To investigate factors predicting frailty for one year in pre-frail patients with rheumatoid arthritis (RA). METHOD: A total of 298 RA patients who were pre-frail in 2020 were evaluated in this structured, retrospective observational study. Of the 298 patients, 42 who were frail and 256 who were not in 2021 were assigned to the frailty and non-frailty groups, respectively. After comparing characteristics of both groups using univariate analysis, predictive factors of frailty were assessed by logistic regression analysis. The proportion of frail patients in 2021 by DAS28-ESR level in 2020 was examined by the Cochran-Armitage trend test and chi-squared test. After dividing pre-frail patients into those with DAS28-ESR ≥3.2 and DAS28-ESR <3.2 in 2020, one-year change in DAS28-ESR in the frailty and non-frailty groups for both subgroups were compared by the paired t-test. RESULTS: The frailty group was older (mean: 71.0 vs. 65.4 years) and had a higher DAS28-ESR (mean: 3.22 vs. 2.70) than the non-frailty group. DAS28-ESR was identified as a predictive factor for frailty (OR: 1.49). Among patients with DAS28-ESR ≥3.2 in 2020, DAS28-ESR improved in the non-frailty group in 2021 (mean: 3.97 in 2020 vs. 3.13 in 2021) but did not in the frailty group (3.97 in 2020 vs. 3.81 in 2021). Among those with DAS28-ESR <3.2 in 2020, DAS28-ESR was unchanged in the non-frailty group in 2021 (2.15 in 2020 vs. 2.23 in 2021) but increased in the frailty group (2.53 in 2020 vs. 3.23 in 2021). CONCLUSIONS: Disease activity at baseline is an independent predictor of frailty one year later in pre-frail patients with RA.