{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T01:51:45Z","timestamp":1785894705619,"version":"3.56.0"},"reference-count":31,"publisher":"Oxford University Press (OUP)","issue":"8","license":[{"start":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T00:00:00Z","timestamp":1776038400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,5]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Identifying people with prior HIV care experience in clinical cohorts requires historical HIV data. We examined the availability of historical antiretroviral therapy (ART) prescriptions, historical CD4 counts, historical HIV viral loads, suppressed viral load at enrollment, and historical AIDS defining conditions in United States-based clinical cohorts in the North American AIDS Cohort Collaboration on Research and Design (NA-ACCORD). At enrollment, we classified participants as new to care, transfer (without a gap in care), re-engaging in care (transfer after a gap in care), or previously in care with unknown transfer status. From 2000 to 2022, transfers increased from 30% to 68% while new to care declined from 31% to 21%. Historical ART prescriptions and suppressed viral load at enrollment became increasingly common data types for identifying prior HIV care, specifically after 2012. Among participants not new to care with \u22651 known historical HIV date, the median time between earliest known HIV date and enrollment increased from 1.9\u00a0years in 2000 to 5.6\u00a0years in 2022. While some data types may serve as practical proxies, we recommend that HIV cohorts systematically collect and assess all 5 data types to improve identification of participants new to care and adopt our algorithm specific to their context.<\/jats:p>","DOI":"10.1093\/aje\/kwag082","type":"journal-article","created":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T11:44:07Z","timestamp":1775735047000},"page":"2287-2296","source":"Crossref","is-referenced-by-count":0,"title":["New to cohort, not new to care: leveraging historical data in HIV clinical cohorts in the United States"],"prefix":"10.1093","volume":"195","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2602-4214","authenticated-orcid":false,"given":"Nel Jason L","family":"Haw","sequence":"first","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7100-8910","authenticated-orcid":false,"given":"Brenna","family":"Hogan","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth","family":"Humes","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6423-1137","authenticated-orcid":false,"given":"Sally B","family":"Coburn","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chunyan","family":"Zheng","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yawei","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yue","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kelly A","family":"Gebo","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Johns Hopkins Medicine , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennifer O","family":"Lam","sequence":"additional","affiliation":[{"name":"Division of Research, Kaiser Permanente Northern California , Pleasanton, CA ,","place":["United States"]},{"name":"Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine , Pleasanton, CA ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maile Y","family":"Karris","sequence":"additional","affiliation":[{"name":"Department of Medicine, University of California San Diego , San Diego, CA ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7665-2230","authenticated-orcid":false,"given":"Lauren C","family":"Zalla","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael A","family":"Horberg","sequence":"additional","affiliation":[{"name":"Kaiser Permanente Mid-Atlantic Permanente Research Institute, Kaiser Permanente Mid-Atlantic States , Washington, DC ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9032-3713","authenticated-orcid":false,"given":"Sonia","family":"Napravnik","sequence":"additional","affiliation":[{"name":"Department of Medicine, Division of Infectious Diseases, University of North Carolina at Chapel Hill , Chapel Hill, NC ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M John","family":"Gill","sequence":"additional","affiliation":[{"name":"Department of Medicine, Cumming School of Medicine, University of Calgary , Calgary, AB ,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keri N","family":"Althoff","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1717-2592","authenticated-orcid":false,"given":"Catherine R","family":"Lesko","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,4,13]]},"reference":[{"issue":"Supplement 8 Suppl 3","key":"2026080421270458300_ref1","doi-asserted-by":"publisher","first-page":"S30","DOI":"10.1097\/MLR.0b013e31829b1dbd","article-title":"Caveats for the use of operational electronic health record data in comparative effectiveness research","volume":"51","author":"Hersh","year":"2013","journal-title":"Med Care"},{"issue":"8","key":"2026080421270458300_ref2","doi-asserted-by":"crossref","DOI":"10.1093\/ofid\/ofac336","article-title":"Toward ending the HIV epidemic: temporal trends and disparities in early ART initiation and early viral suppression among people newly entering HIV care in the United States, 2012\u20132018","volume":"9","author":"Li","year":"2022","journal-title":"Open Forum Infect Dis"},{"issue":"4","key":"2026080421270458300_ref3","doi-asserted-by":"publisher","DOI":"10.1002\/jia2.25484","article-title":"Weight gain among treatment-na\u00efve persons with HIV starting integrase inhibitors compared to non-nucleoside reverse transcriptase inhibitors or protease inhibitors in a large observational cohort in the United States and Canada","volume":"23","author":"Bourgi","year":"2020","journal-title":"J Int AIDS Soc"},{"issue":"2","key":"2026080421270458300_ref4","doi-asserted-by":"publisher","first-page":"214","DOI":"10.1002\/pds.5379","article-title":"Do contemporary antiretrovirals increase the risk of end-stage liver disease? 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