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Article Abstract
Background: Studies on the risk and protective factors for lung function decline and mortality in rheumatoid arthritis-related interstitial lung disease (RA-ILD) are limited.
Objectives: We aimed to investigate clinical factors and medication uses associated with lung function decline and mortality in RA-ILD.
Methods: This retrospective cohort study examined the medical records of patients with RA-ILD who visited Severance Hospital between January 2006 and December 2019. We selected 170 patients with RA-ILD who had undergone at least one spirometry test and chest computed tomography scan. An absolute decline of ⩾10% in the functional vital capacity (FVC) was defined as significant decline in pulmonary function. Data for analysis were retrieved from electronic medical records.
Results: Ninety patients (52.9%) were female; the mean age was 64.0 ± 10.2 years. Multivariate logistic regression showed that a high erythrocyte sediment rate level at baseline [odds ratio (OR) = 3.056; 95% confidence interval (CI) = 1.183-7.890] and methotrexate (MTX) use (OR = 0.269; 95% CI = 0.094-0.769) were risk and protective factors for lung function decline, respectively. Multivariate Cox regression analysis indicated that age ⩾65 years (OR = 2.723; 95% CI = 1.142-6.491), radiologic pattern of usual interstitial pneumonia (UIP) or probable UIP (OR = 3.948; 95% CI = 1.522-10.242), baseline functional vital capacity (FVC) % predicted (OR = 0.971; 95% CI = 0.948-0.994), and MTX use (OR = 0.284; 95% CI = 0.091-0.880) were predictive of mortality.
Conclusion: We identified risk and protective factors for lung function decline and mortality in patients with RA-ILD. MTX use was associated with favorable outcome in terms of both lung function and mortality in our cohort.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9647291 | PMC |
| http://dx.doi.org/10.1177/17534666221135314 | DOI Listing |
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