Abstract
Frailty is defined as the degradation of physical and cognitive function in older adults. The relationship between frailty and disease activity in patients with rheumatoid arthritis is unclear. Factors related to frailty in Japanese rheumatoid arthritis patients were investigated in a cross-sectional analysis. Of 100 patients who entered the prospective, observational Correlation research of sarcopenia, skeletal muscle and disease activity in rheumatoid arthritis (CHIKARA) study, 95 completed a frailty check list (maximal score 25), and were classified as frail (8-25 points), pre-frail (4-7 points) and normal (0-3 points). The relationship with disease activity was investigated in the frailty, pre-frailty and normal groups. Relationships between clinical variables and frailty were evaluated by univariate and multiple logistic regression analyses. The prevalences of frailty, pre-frailty and normal were 18.9%, 38.9% and 42.2%, respectively. The disease activity score 28 erythrocyte sedimentation rate, matrix metalloproteinase 3 and modified health assessment questionnaire were higher in the frailty group. In remission, 66.6% were normal and 6.7% had frailty, but with moderate and high disease activity, 13.3% were normal and 46.7% had frailty. On univariate analysis, factors positively related to frailty were age, locomotive syndrome, disease activity score 28 erythrocyte sedimentation rate, matrix metalloproteinase 3, use of biological disease-modifying antirheumatic drugs or targeted synthetic disease-modifying antirheumatic drugs, Steinbrocker class and modified health assessment questionnaire; and the leg muscle score and grip strength were negatively related. Matrix metalloproteinase 3 was the only independent factor on multivariate logistic analysis. In patients aged >60 years, this tendency was similar. Frailty was found to be related to disease activity and physical function in rheumatoid arthritis. Control of disease activity appears important to prevent frailty. Geriatr Gerontol Int 2019; 19: 1220-1225.
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