{"id":21912,"date":"2025-06-03T10:43:55","date_gmt":"2025-06-03T14:43:55","guid":{"rendered":"https:\/\/www.ices.on.ca\/?post_type=journal_article&#038;p=21912"},"modified":"2025-07-10T12:01:11","modified_gmt":"2025-07-10T16:01:11","slug":"hospitalization-trends-and-risk-factors-in-rheumatoid-arthritis-related-interstitial-lung-disease","status":"publish","type":"journal_article","link":"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/hospitalization-trends-and-risk-factors-in-rheumatoid-arthritis-related-interstitial-lung-disease\/","title":{"rendered":"Hospitalization trends and risk factors in rheumatoid arthritis related interstitial lung disease: an observational study from Ontario, Canada"},"content":{"rendered":"<p><strong>Background<\/strong> \u2014 Rheumatoid arthritis related interstitial lung disease (RA-ILD) represents an important disease manifestation of RA. There is a scarcity of population level information on hospitalization rates in RA-ILD.<\/p>\n<p><strong>Research question<\/strong> \u2014 What are the current rates and trends in all-cause and RA-ILD related hospitalizations in patients with RA-ILD?<\/p>\n<p><strong>Study design and methods<\/strong> \u2014 We performed a retrospective observational study using health services data from Ontario, Canada between 2003 and 2022. We identified people with RA-ILD using the Ontario Rheumatoid Arthritis Database and required repeated physician claims for ILD prior to cohort entry. We estimated age- and sex-standardized annual all-cause and RA-ILD related hospitalization rates during the study period. We performed multivariable logistic regression to ascertain factors associated with a RA-ILD diagnosis during a hospitalization and generated a Fine-Gray subdistribution hazards model with competing risk to assess the time to RA-ILD related hospitalization.<\/p>\n<p><strong>Results<\/strong> \u2014 We identified 7,075 people with RA-ILD during the cohort period. Standardized all-cause hospitalization rates increased from 6.4 to 12.9 admissions per 100,000 population between 2003 and 2022 (101% increase, p&lt;0.001). RA-ILD related hospitalizations increased from 2.6 to 3.5 admissions per 100,000 (37% increase, p=0.045). In-hospital mortality from RA-ILD related admissions was 19.5 deaths per 100 admissions in 2022, having remained stable over time (p=0.62). Patients in the lowest income quintile [OR 1.35 (1.06-1.72), p=0.02] and residing in rural areas [OR 1.37 (1.11-1.70), p=0.004] were more likely to be diagnosed with RA-ILD during a hospitalization. Patients diagnosed with RA-ILD during a hospitalization had an increased hazard for future RA-ILD related admissions [HR 1.44 (1.24-1.68), p&lt;0.001].<\/p>\n<p><strong>Interpretation<\/strong> \u2014 All-cause and RA-ILD related hospitalizations are increasing. In-hospital mortality has not changed over time but remains substantial. Socioeconomic factors are associated with receiving a RAILD diagnosis in hospital, which appears to be an important risk factor for future RA-ILD related admissions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background \u2014 Rheumatoid arthritis related interstitial lung disease (RA-ILD) represents an important disease manifestation of RA. There is a scarcity of population level information on hospitalization rates in RA-ILD. Research question \u2014 What are the current rates and trends in all-cause and RA-ILD related hospitalizations in patients with RA-ILD? Study design and methods \u2014 We [&hellip;]<\/p>\n","protected":false},"template":"","migration-helper-automated":[],"migration-manual":[],"topic":[52,51],"migration-helper-qa-sample-set":[],"class_list":["post-21912","journal_article","type-journal_article","status-publish","hentry","topic-lung-health","topic-musculoskeletal-diseases-and-disorders"],"acf":{"citation":"Fidler L, Munn J, Fisher JH, Shapera S, Gershon AS. <em>Chest<\/em>. 2025; S0012-3692(25)00680-4. Epub 2025 Jun 3.","source_url":"https:\/\/doi.org\/10.1016\/j.chest.2025.05.030","ices_scientist":[20911,1244],"site":[6735],"research_program":[6746],"news_release":"","journal_article":"","atlas":"","research_report":"","infographic":"","video":"","downloads":null,"links":null,"sitecore_item_id":"","sitecore_item_name":"","sitecore_field_values":"","previous_url":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ICES | Hospitalization trends and risk factors in rheumatoid arthritis related interstitial lung disease: an observational study from Ontario, Canada<\/title>\n<meta name=\"description\" content=\"Background \u2014 Rheumatoid arthritis related interstitial lung disease (RA-ILD) represents an important disease manifestation of RA. 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