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Medical record review confirmed ILD among participants screening positive and a random sample of those screening negative. ICD and procedure codes, provider specialty, and dates were extracted from Veterans Affairs administrative data to construct ILD algorithms. Performance of these algorithms against medical record review was assessed by sensitivity, specificity, positive predictive value (PPV), negative predictive value, and kappa using inverse probability weighting to account for sampling methods.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Medical records of 536 RA patients were reviewed, confirming 182 (stringent definition) and 203 (relaxed definition) cases of ILD. Initially, we identified \u22652 ICD codes from inpatient or outpatient encounters as optimal discriminating factors (specificity 96.0%, PPV 65.5%; \u03ba = 0.70). Subsequently, we constructed a set of ICD\u20109 and ICD\u201010 codes that improved algorithm specificity (specificity 96.8%, PPV 69.5%; \u03ba = 0.72). Algorithms that included a pulmonologist diagnosis or chest computed tomography plus pulmonary function testing or lung biopsy had improved performance (specificity 98.0%, PPV 77.4%; \u03ba = 0.75). PPV increased with exclusion of other ILD causes (78.5%) in comparison with the relaxed ILD definition (82.4%) and in sensitivity analyses (83.4\u201386.3%). Gains in specificity and PPV with greater algorithm requirements were accompanied by declines in sensitivity.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Administrative algorithms with optimal combinations of ICD codes, provider specialty, diagnostic testing, and exclusion of other ILD causes accurately classify ILD in RA.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/acr.24043","type":"journal-article","created":{"date-parts":[[2019,8,17]],"date-time":"2019-08-17T10:50:18Z","timestamp":1566039018000},"page":"1392-1403","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":35,"title":["Performance of Administrative Algorithms to Identify Interstitial Lung Disease in Rheumatoid Arthritis"],"prefix":"10.1002","volume":"72","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9649-3588","authenticated-orcid":false,"given":"Bryant R.","family":"England","sequence":"first","affiliation":[{"name":"VA Nebraska\u2013Western Iowa Health Care System and University of Nebraska Medical Center  Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Punyasha","family":"Roul","sequence":"additional","affiliation":[{"name":"University of Nebraska Medical Center  Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tina D.","family":"Mahajan","sequence":"additional","affiliation":[{"name":"University of Nebraska Medical Center  Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7149-363X","authenticated-orcid":false,"given":"Namrata","family":"Singh","sequence":"additional","affiliation":[{"name":"Center for Comprehensive Access Delivery Research Iowa City VA, and University of Iowa Hospitals and Clinics  Iowa City"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fang","family":"Yu","sequence":"additional","affiliation":[{"name":"University of Nebraska Medical Center  Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harlan","family":"Sayles","sequence":"additional","affiliation":[{"name":"University of Nebraska Medical Center  Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6640-9173","authenticated-orcid":false,"given":"Grant W.","family":"Cannon","sequence":"additional","affiliation":[{"name":"VA Salt Lake City and University of Utah  Salt Lake City"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian C.","family":"Sauer","sequence":"additional","affiliation":[{"name":"VA Salt Lake City and University of Utah  Salt Lake City"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joshua F.","family":"Baker","sequence":"additional","affiliation":[{"name":"Corporal Michael J. Crescenz VA and University of Pennsylvania  Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8907-8976","authenticated-orcid":false,"given":"Jeffrey R.","family":"Curtis","sequence":"additional","affiliation":[{"name":"University of Alabama at Birmingham  Birmingham"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0897-2272","authenticated-orcid":false,"given":"Ted R.","family":"Mikuls","sequence":"additional","affiliation":[{"name":"VA Nebraska\u2013Western Iowa Health Care System and University of Nebraska Medical Center  Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,9,29]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/art.27405"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/keu165"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/keq035"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1136\/ard.62.9.897"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1164\/ajrccm.156.2.9609016"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/nrrheum.2016.34"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13075-015-0835-7"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.3899\/jrheum.171315"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.201004-0622OC"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/art.21806"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1136\/annrheumdis-2017-211138"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/pds.3409"},{"key":"e_1_2_6_14_1","first-page":"24","article-title":"Insights and Implications of the VA Rheumatoid Arthritis Registry","volume":"32","author":"Mikuls TR","year":"2015","journal-title":"Fed Pract"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1002\/art.1780310302"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2009.120626"},{"key":"e_1_2_6_17_1","article-title":"The REDCap Consortium: building an international community of software platform partners","volume":"103208","author":"Harris PA","year":"2019","journal-title":"J Biomed Inform"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jbi.2008.08.010"},{"key":"e_1_2_6_19_1","doi-asserted-by":"crossref","first-page":"880","DOI":"10.1513\/AnnalsATS.201610-764OC","article-title":"Code-based diagnostic algorithms for idiopathic pulmonary fibrosis: case validation and improvement","volume":"14","author":"Ley B","year":"2017","journal-title":"Ann Am Thorac Soc"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.200602-163OC"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.2307\/2529310"},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1002\/sim.4422"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jclinepi.2010.10.006"},{"key":"e_1_2_6_24_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.201504-0818OC"},{"key":"e_1_2_6_25_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.vaccine.2013.03.075"},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.vaccine.2013.06.104"},{"key":"e_1_2_6_27_1","doi-asserted-by":"publisher","DOI":"10.1002\/art.22474"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12911-016-0319-y"},{"key":"e_1_2_6_29_1","doi-asserted-by":"publisher","DOI":"10.1183\/09059180.00008014"}],"container-title":["Arthritis Care &amp; 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