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The psychometric properties of each IB (e.g. measurement precision; item \u201cfit\u201d; differential item functioning) were assessed using Rasch analysis. The mean number of items required for \u2018high\u2019 (0.3 standard error [SE]) and \u2018moderate\u2019 (0.387 SE) precision was determined using CAT simulations.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The 298 patients (57.4% male) had a mean (SD) age of 60.7 (10.8) years and DM duration of 15.3 (9.7) years. Overall, SY, DT, WK, EM, and CN displayed acceptable measurement performance after deleting 15 problematic items, with some limitations in targeting at higher levels of the latent trait, particularly for EM. The DMn domain was multidimensional and subsequently split into two unidimensional domains (DMn-Convenience [DMn-CV] and DMn-Concerns [DMn-CN]). Owing to unresolvable psychometric issues, AL was dropped. In CAT simulations, the mean number of items required per IB ranged from 9 (CN, DMn-CV, WK) to 11 (EM) for moderate, and 14 (DT) to 18 (EM) for high measurement precision.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Comprising 213 items within seven psychometrically valid and efficient IBs, DiabCAT enables researchers and clinicians to comprehensively assess the QoL impact of T2DM and its management with relatively low administration burden. Further assessment of its reliability, validity and responsiveness is warranted.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s11136-026-04387-6","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T14:56:03Z","timestamp":1790002563000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Quality of life item banks for type 2 diabetes: psychometric evaluation and computerized adaptive testing simulations"],"prefix":"10.1007","volume":"35","author":[{"given":"Eva","family":"K. Fenwick","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan","family":"E.K. Man","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aricia","family":"X.Y. Ho","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ester","family":"P.X. 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