{"id":5219,"date":"2012-12-13T00:00:00","date_gmt":"2012-12-13T05:00:00","guid":{"rendered":"https:\/\/icesontario.wpengine.com\/journal-articles\/incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study\/"},"modified":"2023-06-14T19:47:34","modified_gmt":"2023-06-14T23:47:34","slug":"incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study","status":"publish","type":"journal_article","link":"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study\/","title":{"rendered":"Incidence and economic burden of adverse drug reactions among elderly patients in Ontario emergency departments: a retrospective study"},"content":{"rendered":"<p><strong>Background<\/strong> &#x2014; The rapid rise in the availability and use of pharmaceutical agents, and particularly polypharmacy, directly increases the risk for patients to experience adverse drug reactions (ADRs). There are few studies on the overall incidence and costs of ADRs.<\/p>\n<p><strong>Objective<\/strong> &#x2014; The aim of this study was to estimate the incidence and costs of emergency department (ED) visits related to ADRs for patients greater than 65 years of age using administrative data, and to describe risk factors for experiencing severe ADRs.<\/p>\n<p><strong>Methods<\/strong> &#x2014; The authors employed a retrospective cohort design based on population-based healthcare administrative clinical databases. Identification of ADR-related ED visits from the administrative database was based on International Classification of Diseases, 10th Revision&#x2013;Canadian Enhancement (ICD-10-CA) codes for each ED visit. The incidence and costs of ADR-related ED visits and subsequent hospital admissions were estimated for all adults aged 66 years and above for the period April 2003 to March 2008. Costs were standardized and reported in 2008 Canadian dollars. Logistic regression was used to detect risk factors for severe ADRs.<\/p>\n<p><strong>Results<\/strong>&#xa0;&#x2014;&#xa0;Approximately 0.75% of total annual ED visits among adults aged 66 years and above were found to be ADR-related, and among these patients 21.6% were hospitalized. In 2007, the cost of ADR-related visits was &#x24;333 per ED visit and &#x24;7,528 per hospitalization for a total annual cost of &#x24;13.6&#x2009;million in Ontario, or an estimated &#x24;35.7&#x2009;million in Canada. Severe ADRs were associated with sex, age, comorbid disease burden, multiple drugs, multiple pharmacies, newly prescribed drugs, recent ED visit, recent hospitalization and long-term care (LTC) residence.<\/p>\n<p><strong>Conclusions<\/strong> &#x2014; ADRs are an important public health issue that threaten the safety of drug therapy and results in significant economic burden to the healthcare system. ED visits related to ADRs may be underestimated in retrospective studies using administrative data compared with prospective studies. Further research is needed to better understand the risk of experiencing severe ADRs among LTC residents.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background &#x2014; The rapid rise in the availability and use of pharmaceutical agents, and particularly polypharmacy, directly increases the risk for patients to experience adverse drug reactions (ADRs). There are few studies on the overall incidence and costs of ADRs. Objective &#x2014; The aim of this study was to estimate the incidence and costs of [&hellip;]<\/p>\n","protected":false},"template":"","migration-helper-automated":[],"migration-manual":[],"topic":[24,56],"migration-helper-qa-sample-set":[],"class_list":["post-5219","journal_article","type-journal_article","status-publish","hentry","topic-acute-and-emergency-services","topic-pharmacoepidemiology-and-drug-safety"],"acf":{"citation":"Wu C, Bell CM, Wodchis WP. <em>Drug Saf<\/em>. 2012; 35(9):769-81. Epub 2012 Dec 13.","source_url":"https:\/\/link.springer.com\/article\/10.1007%2FBF03261973","ices_scientist":[1172,1135,17132],"site":[6733,6735],"research_program":[6746,6740],"news_release":[7490],"journal_article":[],"atlas":[],"research_report":[],"infographic":[],"video":[],"downloads":null,"links":null,"sitecore_item_id":"69ED0290-5B0D-4B87-A332-870306BFE241","sitecore_item_name":"Incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-Ontario-emergency","sitecore_field_values":"{\n  \"Title\": \"Incidence and economic burden of adverse drug reactions among elderly patients in Ontario emergency departments: a retrospective study\",\n  \"Short title\": \"Incidence and economic burden\",\n  \"Citation\": \"<p>Wu C, Bell CM, Wodchis WP. <em>Drug Saf<\/em>. 2012; 35(9):769-81. Epub 2012 Dec 13.<\/p>\",\n  \"Abstract\": \"<p><strong>Background<\/strong> &mdash; The rapid rise in the availability and use of pharmaceutical agents, and particularly polypharmacy, directly increases the risk for patients to experience adverse drug reactions (ADRs). There are few studies on the overall incidence and costs of ADRs.<\/p>n<p><strong>Objective<\/strong> &mdash; The aim of this study was to estimate the incidence and costs of emergency department (ED) visits related to ADRs for patients greater than 65 years of age using administrative data, and to describe risk factors for experiencing severe ADRs.<\/p>n<p><strong>Methods<\/strong> &mdash; The authors employed a retrospective cohort design based on population-based healthcare administrative clinical databases. Identification of ADR-related ED visits from the administrative database was based on International Classification of Diseases, 10th Revision&ndash;Canadian Enhancement (ICD-10-CA) codes for each ED visit. The incidence and costs of ADR-related ED visits and subsequent hospital admissions were estimated for all adults aged 66 years and above for the period April 2003 to March 2008. Costs were standardized and reported in 2008 Canadian dollars. Logistic regression was used to detect risk factors for severe ADRs.<\/p>n<p><strong>Results<\/strong>&nbsp;&mdash;&nbsp;Approximately 0.75% of total annual ED visits among adults aged 66 years and above were found to be ADR-related, and among these patients 21.6% were hospitalized. In 2007, the cost of ADR-related visits was $333 per ED visit and $7,528 per hospitalization for a total annual cost of $13.6&thinsp;million in Ontario, or an estimated $35.7&thinsp;million in Canada. Severe ADRs were associated with sex, age, comorbid disease burden, multiple drugs, multiple pharmacies, newly prescribed drugs, recent ED visit, recent hospitalization and long-term care (LTC) residence.<\/p>n<p><strong>Conclusions<\/strong> &mdash; ADRs are an important public health issue that threaten the safety of drug therapy and results in significant economic burden to the healthcare system. ED visits related to ADRs may be underestimated in retrospective studies using administrative data compared with prospective studies. Further research is needed to better understand the risk of experiencing severe ADRs among LTC residents.<\/p>n<p><a href=\"https:\/\/link.springer.com\/article\/10.1007%2FBF03261973\" title=\"Opens external link\">View full text<\/a><\/p>\",\n  \"Keywords\": \"{B711DE54-5056-420D-AA0E-1349F1D88049}|{636318BA-F652-4567-A4B3-0E00CEAE81E1}\",\n  \"Related Products\": \"<h2>News Release<\/h2>rn<h3><a href=\"~\/link.aspx?_id=7A9849802B4F4DF58F0A6D66C77E22FC&amp;_z=z\">ICES study shows economic burden associated with adverse drug reactions among elderly in Ontario<\/a><\/h3>\",\n  \"Research Programs\": \"{CFE36C89-C969-4C23-B5E4-1BA9E5BDC273}|{46DF28D2-EDE8-4DF2-8CC0-87CEF464E435}\",\n  \"ICES Locations\": \"{4FCAABBA-14A5-42E6-8F33-BC6C2F1D9908}|{FBE2D1B1-C0BA-423F-8D16-39466B6C1424}\",\n  \"ICES Scientists\": \"{9F60496B-63FD-4BE5-A7EF-C4969D7AACB3}|{26C6C411-14DA-4E2F-9D10-9564115ADE0A}\",\n  \"Posted Date\": \"20121213T000000\"\n}","previous_url":"https:\/\/www.ices.on.ca\/Publications\/Journal-Articles\/2012\/January\/Incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-Ontario-emergency"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ICES | Incidence and economic burden of adverse drug reactions among elderly patients in Ontario emergency departments: a retrospective study<\/title>\n<meta name=\"description\" content=\"Background &#x2014; The rapid rise in the availability and use of pharmaceutical agents, and particularly polypharmacy, directly increases the risk for\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ICES | Incidence and economic burden of adverse drug reactions among elderly patients in Ontario emergency departments: a retrospective study\" \/>\n<meta property=\"og:description\" content=\"Background &#x2014; The rapid rise in the availability and use of pharmaceutical agents, and particularly polypharmacy, directly increases the risk for\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ices.on.ca\/fr\/publications\/journal-articles\/incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study\/\" \/>\n<meta property=\"og:site_name\" content=\"ICES\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/ICESOntario\/\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-14T23:47:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ices.on.ca\/wp-content\/uploads\/2024\/11\/ic-es-data-discovery-better-health-logo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ices.on.ca\\\/fr\\\/publications\\\/journal-articles\\\/incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study\\\/\",\"url\":\"https:\\\/\\\/www.ices.on.ca\\\/fr\\\/publications\\\/journal-articles\\\/incidence-and-economic-burden-of-adverse-drug-reactions-among-elderly-patients-in-ontario-emergency-departments-a-retrospective-study\\\/\",\"name\":\"ICES | Incidence and economic burden of adverse drug reactions among elderly patients in Ontario emergency departments: a retrospective study\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ices.on.ca\\\/fr\\\/#website\"},\"datePublished\":\"2012-12-13T05:00:00+00:00\",\"dateModified\":\"2023-06-14T23:47:34+00:00\",\"description\":\"Background &#x2014; 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