We obtained baseline variables, including age, sex, urbanization level (stratified into 3 levels: urban, suburban and rural), and confounding factors, such as diabetes mellitus (DM; ICD-9-CM code 250), hypertension (ICD-9-CM codes 401–405), hyperlipidemia (ICD-9-CM codes 272.0– 272.4),...
and Follow-Up Time Patients aged 20 years or older with newly diagnosed hyperthyroidism were identified using validated International Classification of Diseases, Ninth Revision (ICD-9) or International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10) codes for ...