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Table 1 Characteristics of studies selected for estimation of prevalence of GO

From: Graves’ orbitopathy as a rare disease in Europe: a European Group on Graves’ Orbitopathy (EUGOGO) position statement

Study Study population Country Years studied Type of study
Abraham-Nordling et al. [18] 3.5 million general population Sweden 2003–2005 Prospective, population registry-based, reporting on incidence of Graves’ hyperthyroidism and all grades of severity of GO
Zaletel et al. [19] 1.0 million general population Slovenia 1999–2009 Single institution, prospective cohort study of patients with thyroid disease, including Graves’ hyperthyroidism as a subgroup
Laurberg et al. [20] 0.5 million general population Denmark 1992–2011 Single institution, prospective cohort study, reporting on incidence of moderate-to- severe GO