Predictors of uveitic macular edema and functional prognostic outcomes. real-life data from the international AIDA Network uveitis registry

Objectives: To detect factors capable of predicting the development of macular edema (ME) throughout the disease course in patients affected by non-infectious uveitis (NIU). Methods: Predictive factors leading to the development of ME were analyzed through regression analysis. The functional impact of ME on best corrected visual acuity (BCVA) was also examined. Results: A total of 1,160 NIU patients (1,857 eyes) were analyzed. ME was observed in 148 (12.76%), affecting 211 eyes. It was significantly more frequent in patients with non-anterior NIU (p < 0.0001, RR = 4.01), retinal vasculitis (p < 0.0001), and other structural complications (p = 0.0005). Gender, HLA-B*27 and/or HLA-B*51 positivity, and ethnicity did not show any significant impact on the prevalence of ME (p = 0.635, p = 0.372, p = 0.193, respectively). Four variables were associated with ME development during NIU course: the non–anterior anatomical pattern (p < 0.0001, OR = 4.01), the presence of retinal vasculitis (p = 0.028, OR = 1.68), complications other than ME (p = 0.044, OR = 1.51) and immunosuppressive treatment (p = 0.010, OR 1.69) while the diagnosis of Behçet disease-related uveitis was less likely to be associated with ME development (p = 0.24, OR 0.545). Mean ± SD BCVA was significantly lower in eyes with ME (0.82 ± 0.30) compared to eyes without ME (0.71 ± 0.33). Conclusion: ME can develop across all NIU types, but is more likely in cases involving the posterior segment and retinal vasculitis. Regular and focused monitoring is recommended for these high-risk patients. The study also highlights the limited predictive value of demographic and HLA-related factors, helping refine clinical risk stratification and predictive modeling in NIU.