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Using a nationally representative Health and Retirement Study sample (≥50 years; waves 13–14; n=13,852), obesity prevalence is 45.9% under BMI alone versus 40.4% under NewDef. Reclassification shows differing distributions by waist circumference and obesity-related chronic conditions, with NewDef reducing counted cases by 754. Findings suggest improved risk targeting, while limited documentation of obesity-related chronic conditions constrains accuracy and underscores the need for better clinical data.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/prevalence-of-the-recently-proposed-clinical-obesity-among-older-adults-health-and-retirement-study-hrs/426451/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/prevalence-of-the-recently-proposed-clinical-obesity-among-older-adults-health-and-retirement-study-hrs/426451.png","ImageObject",300,407,{"name":92,"@type":93},"Kurz","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-24","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How do CurDef and NewDef define obesity in older adults?","Question",{"text":112,"@type":113},"CurDef labels obesity using BMI≥30 kg/m². NewDef classifies individuals as “clinical obese” only when BMI≥30 is accompanied by high adiposity measured by waist circumference and an obesity-related chronic condition.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What is the difference in obesity prevalence between CurDef and NewDef?",{"text":117,"@type":113},"In the HRS sample, prevalence is 45.9% using CurDef and 40.4% using NewDef, corresponding to a reduction of 754 individuals reclassified as non-obese.",{"name":119,"@type":110,"acceptedAnswer":120},"Why does the NewDef approach lower prevalence, and what limitation affects accuracy?",{"text":121,"@type":113},"NewDef requires both high BMI and high waist circumference plus an obesity-related chronic condition, so some individuals meeting BMI criteria lack the required condition documentation. The lack of detailed information on whether chronic conditions are obesity-related limits accuracy, indicating a need for improved health condition reporting.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},426451,1791233243,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24},2336478945635,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Innovation in Aging, 2025, Vol. 9, No. S2 389  \nAbstract citation ID: igaf122.1324  \nPREVALENCE OF THE RECENTLY PROPOSED CLINICAL OBESITY AMONG OLDER ADULTS FROM THE HEALTH AND RETIREMENT STUDY  \nWeiyang Ding1, Ngai Kwan2, and Laurie Milliken1,  \n1. University of Massachusetts Boston, Boston, Massachusetts, United States, 2. Institute for Community Inclusion, Boston, Massachusetts, United States  \nObesity is traditionally defined as a body mass index (BMI)≥30 kg/m² (CurDef), but this may overlook health risks,  \n390 Innovation in Aging, 2025, Vol. 9, No. S2  \nespecially in older adults. The Lancet Diabetes and Endocrinology Commission on Obesity recently proposed a new definition (NewDef) that classifies individuals with BMI ≥30kg/m² as “clinical obese” only if they also have high adiposity (measured by waist circumference, WC) and an obesity-related chronic condition. This study compared the prevalence of obesity using NewDef versus CurDef in a nationally representative sample of older adults (≥50 years) from the Health and Retirement Study (HRS) (waves 13 and 14; n = 13,852; 58% female) . The prevalence of obesity was 45.9%(95% CI: 45.1–46.7) using CurDef and 40.4%(95% CI: 39.6–41.3) using NewDef, reducing the number of obese individuals by 754. Among those reclassified as non-obese, 26.6%(18 .4% female) had BMI ≥30 and low WC, 19.6%(18 .9% female) had BMI ≥30, low WC, and ≥1 chronic condition, and 73.3%(53% female) had high BMI and WC but no chronic condition. The NewDef lowers the prevalence of obesity and may better identify older adults at higher health risk by focusing on meaningful health consequences rather than BMI alone. This refined approach could improve clinical care and resource allocation for older adults. However, the lack of detailed information on whether chronic conditions are obesity-related limits the accuracy of the NewDef, highlighting the need for improved health condition documentation in older adult populations.","cbCaimOTGy55D5E4","https://ap.wps.com/l/cbCaimOTGy55D5E4","pdf",746716,"English","# Abstract\n## Obesity definitions compared\n## Study sample and methods\n## Prevalence results and reclassification patterns\n## Implications and limitations","[{\"question\":\"How do CurDef and NewDef define obesity in older adults?\",\"answer\":\"CurDef labels obesity using BMI≥30 kg/m². NewDef classifies individuals as “clinical obese” only when BMI≥30 is accompanied by high adiposity measured by waist circumference and an obesity-related chronic condition.\"},{\"question\":\"What is the difference in obesity prevalence between CurDef and NewDef?\",\"answer\":\"In the HRS sample, prevalence is 45.9% using CurDef and 40.4% using NewDef, corresponding to a reduction of 754 individuals reclassified as non-obese.\"},{\"question\":\"Why does the NewDef approach lower prevalence, and what limitation affects accuracy?\",\"answer\":\"NewDef requires both high BMI and high waist circumference plus an obesity-related chronic condition, so some individuals meeting BMI criteria lack the required condition documentation. The lack of detailed information on whether chronic conditions are obesity-related limits accuracy, indicating a need for improved health condition reporting.\"}]","PREVALENCE OF THE RECENTLY PROPOSED CLINICAL OBESITY AMONG OLDER ADULTS - Health and Retirement Study (HRS) | PDF",1790640635]