Abstract
ObjectivesTo investigate factors predicting frailty for one year in pre-frail patients with rheumatoid arthritis (RA). MethodA 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. ResultsThe 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). ConclusionsDisease activity at baseline is an independent predictor of frailty one year later in pre-frail patients with RA.
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