Supplementary material for: Increased morbidity in gynecomastia: A nationwide register-based cohort study

Context: Evidence on the long-term and general health of males with gynecomastia is entirely lacking.
Objectives: To assess health prior to and following a diagnosis of gynecomastia.
Methods: A register-based cohort study of 140,574 males, of which 23,429 males were diagnosed with incident gynecomastia and age- and calendar-matched (1:5) to 117,145 males without gynecomastia from the background population. Males with gynecomastia were stratified into males without (idiopathic) or with a known pre-existing risk factor (disease/medication). Cox and logistic regression models investigated associations of disease risk according to ICD-10 chapters following and prior to gynecomastia diagnosis.
Results: A total of 16,253 (69.4%) males in the cohort were identified with idiopathic gynecomastia. These males had a statistically significant higher risk of future disease across all included disease chapters (HR range: 1.19 to 1.89), with endocrine diseases representing the greatest disease risk (H..., ,