{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,26]],"date-time":"2026-05-26T10:04:16Z","timestamp":1779789856080,"version":"3.53.1"},"reference-count":30,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T00:00:00Z","timestamp":1774742400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T00:00:00Z","timestamp":1774742400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000062","name":"National Institute of Diabetes and Digestive and Kidney Diseases","doi-asserted-by":"publisher","award":["R01 DK114098"],"award-info":[{"award-number":["R01 DK114098"]}],"id":[{"id":"10.13039\/100000062","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000738","name":"U.S. Department of Veterans Affairs","doi-asserted-by":"publisher","award":["IIR 15\u2010116"],"award-info":[{"award-number":["IIR 15\u2010116"]}],"id":[{"id":"10.13039\/100000738","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000738","name":"U.S. Department of Veterans Affairs","doi-asserted-by":"publisher","award":["I01 HX003527"],"award-info":[{"award-number":["I01 HX003527"]}],"id":[{"id":"10.13039\/100000738","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006379","name":"Office of Research and Development","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006379","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Endocrino Diabet &amp;amp; Metabol"],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Glycemic variability over time is a risk factor for diabetes complications. We studied a new measure of A1c stability, A1c time in range and its association with mortality in adults with diabetes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a retrospective cohort study of people with type 1 and type 2 diabetes from January 1, 2004 to December 31, 2018. Participants were 18\u2009years or older with at least four A1c tests during a three\u2010year baseline. A1c time in range was calculated as the percentage of time during baseline when A1c levels were within person\u2010specific target ranges. We also calculated the percentage of time A1c levels were below target ranges to assess the effects of potential overtreatment. Adjusted models and instrumental variable models were used to measure associations between A1c time in range and mortality.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We studied 84,229 participants with mean age 58.3\u2009years (SD 12.1). In adjusted Cox models, each 20% decrement in A1c time in range was associated with increased mortality (A1c time in range [0%\u2009&lt;\u200920%] HR, 1.30; 95% CI 1.23\u20131.37). Instrumental variable models to control for unmeasured confounding also showed associations between reduced A1c time in range (0%\u2009&lt;\u200920%) and mortality (HR, 1.28, 95% CI 1.22\u20131.35). Mortality risks were similar in subgroups with or without prevalent cardiovascular disease and insulin users but were greater in older adults (\u2265\u200960\u2009years). Greater (\u2265\u200960%) A1c time below range was associated with increased mortality (HR, 1.35, 95% CI 1.29\u20131.41).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Reduced A1c time in range and particularly greater time below range are associated with increased mortality in adults with diabetes. A1c stability within person\u2010specific ranges may be a risk factor for major outcomes in adults with diabetes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/edm2.70197","type":"journal-article","created":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T18:55:03Z","timestamp":1774810503000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Haemoglobin A1c Time\u2010In\u2010Range and Mortality in Adults With Diabetes"],"prefix":"10.1002","volume":"9","author":[{"given":"Paul R.","family":"Conlin","sequence":"first","affiliation":[{"name":"VA Boston Healthcare System  Boston Massachusetts USA"},{"name":"Harvard Medical School  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julia C.","family":"Prentice","sequence":"additional","affiliation":[{"name":"VA Boston Healthcare System  Boston Massachusetts USA"},{"name":"Boston University School of Medicine  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3184-6338","authenticated-orcid":false,"given":"David C.","family":"Mohr","sequence":"additional","affiliation":[{"name":"National Center for Organizational Development, Veterans Health Administration  Mason Ohio USA"},{"name":"Boston University School of Public Health  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Libin","family":"Zhang","sequence":"additional","affiliation":[{"name":"VA Boston Healthcare System  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donglin","family":"Li","sequence":"additional","affiliation":[{"name":"VA Boston Healthcare System  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erin","family":"Pleasants","sequence":"additional","affiliation":[{"name":"VA Boston Healthcare System  Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard E.","family":"Nelson","sequence":"additional","affiliation":[{"name":"VA Salt Lake City Healthcare System  Salt Lake City Utah USA"},{"name":"University of Utah  Salt Lake City Utah USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suma","family":"Vupputuri","sequence":"additional","affiliation":[{"name":"Mid\u2010Atlantic Permanente Research Institute  Rockville Maryland USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gregory A.","family":"Nichols","sequence":"additional","affiliation":[{"name":"Kaiser Permanente Center for Health Research  Portland Oregon USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,3,29]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.2337\/dc15-1188"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2213-8587(18)30048-2"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.2337\/dc19-0848"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1053\/j.ajkd.2023.03.007"},{"issue":"1","key":"e_1_2_9_6_1","first-page":"S132","article-title":"6. 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