Factors Associated with Nonreturn after Loss to Follow-Up from Glaucoma Care: An IRIS® Registry Retrospective Analysis.

purposeLoss to follow-up (LTFU) in primary open-angle glaucoma (POAG) can lead to undertreatment, disease progression, and irreversible vision loss. Patients who become LTFU either eventually re-establish glaucoma care after a lapse or never return to the clinic. The purpose of this study is to examine a large population of patients with POAG who became LTFU to determine the proportion that return to care and to identify demographic and clinical factors associated with nonreturn after LTFU.

designRetrospective longitudinal cohort study.

participantsPatients with a diagnosis of POAG with a clinical encounter in 2014 in the IRIS® Registry (Intelligent Research in Sight).

methodsWe examined follow-up patterns for 553 663 patients with POAG who had an encounter in the IRIS Registry in 2014 by following their documented clinic visits through 2019. LTFU was defined as exceeding 1 calendar year without an encounter. Within the LTFU group, patients were classified as returning after a lapse in care (return after LTFU) or not (nonreturn after LTFU).

main outcome measuresProportion of patients with nonreturn after LTFU and baseline demographic and clinical characteristics associated with nonreturn among LTFU patients with POAG.

resultsAmong 553 663 patients with POAG, 277 019 (50%) had at least 1 episode of LTFU over the 6-year study period. Within the LTFU group, 33% (92 471) returned to care and 67% (184 548) did not return to care. Compared to those who returned to care, LTFU patients with nonreturn were more likely to be older (age >80 years; relative risk [RR] = 1.48; 95% confidence interval [CI]: 1.47-1.50), to have unknown/missing insurance (RR = 1.31; 95% CI: 1.30-1.33), and to have severe-stage POAG (RR = 1.13; 95% CI: 1.11-1.15). Greater POAG severity and visual impairment were associated with nonreturn with a dose-dependent relationship in the adjusted model that accounted for demographic characteristics. Among those with return after LTFU, almost all returned within 2 years of last appointment (82 201; 89%) rather than 2 or more years later.

conclusionsHalf of patients with POAG in the IRIS Registry had at least 1 period of LTFU, and two thirds of LTFU patients with POAG did not return to care. More effort is warranted to re-engage the vulnerable patients with POAG who become LTFU. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.