Purpose: To evaluate prevalence of thyroid eye disease (TED) and associated factors in the American Academy of Ophthalmology IRISⓇ Registry (Intelligent Research in Sight).
Design: Cross-sectional analysis of the IRIS Registry.
Methods: IRIS Registry patients (18-90 years old) were classified as TED (ICD-9: 242.00, ICD-10: E05.00 on ≥2 visits) or non-TED cases, and prevalence was estimated. Odds ratios (OR) and 95% Confidence Intervals (CIs) were estimated using logistic regression.
Results: 41,211 TED patients were identified. TED prevalence was 0.09%, showed a unimodal age distribution (highest prevalence in ages 50-59 years (y) (0.12%)), higher rates in females than males (0.12% vs. 0.04%) and in non-Hispanics than Hispanics (0.10% vs. 0.05%). Prevalence differed by race (from 0.08% in Asians to 0.12% in Black/African-Americans), with varying peak ages of prevalence. Factors associated with TED in multivariate analysis included age: ((18-<30y (reference), 30-39y: OR (95%CI) 2.2 (2.0, 2.4), 40-49y: 2.9 (2.7,3.1), 50-59y: 3.3 (3.1, 3. 5), 60-69y: 2.7 (2.54, 2.85), 70+: 1.5 (1.46, 1.64)); female sex vs male (reference), 3.5 (3.4,3.6), race: White (reference), Blacks: 1.1 (1.1,1.2), Asian: 0.9 (0.8,0.9), Hispanic ethnicity vs not Hispanic (reference), 0.68 (0.6,0.7), smoking status: (never (ref), former: 1.64 (1.6,1.7), current 2.16: (2.1,2.2)) and Type 1 diabetes (yes vs no (reference): 1.87 (1.8, 1.9).
Conclusions: This epidemiologic profile of TED includes new observations such as a unimodal age distribution and racial variation in prevalence. Associations with female sex, smoking, and Type 1 diabetes are consistent with prior reports. These findings raise novel questions about TED in different populations.
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