Mortality data from the European Adrenal Insufficiency Registry—Patient characterization and associations

Objective: Mortality from primary and secondary adrenal insufficiency (AI; PAI and SAI, respectively) is 2-3-fold higher than in the general population. Mortality relates to cardiovascular disease, acute adrenal crisis (AC), cancer and infections; however, there has been little further characterization of patients who have died. Design/Methods: We analysed real-world data from 2034 patients (801 PAI, 1233 SAI) in the European Adrenal Insufficiency Registry (EU-AIR; NCT01661387). Baseline clinical and biochemical data of patients who subsequently died were compared with those who remained alive. Results: From August 2012 to June 2017, 26 deaths occurred (8 PAI, 18 SAI) from cardiovascular disease (n = 9), infection (n = 4), suicide (n = 2), drug-induced hepatitis (n = 2), and renal failure, brain tumour, cachexia and AC (each n = 1); cause of death was unclear in 5 patients. Patients who died were significantly older at baseline than alive patients. Causes of AI were representative of patients with SAI; however, 3-quarters of deceased patients with PAI had undergone bilateral adrenalectomy (3 with uncontrolled Cushing's disease, 3 with metastatic renal cell cancer). There were no significant differences in body mass index, blood pressure, low-density lipoprotein cholesterol, total cholesterol or electrolytes between deceased and alive patients. Deceased patients with SAI were more frequently male individuals, were receiving higher daily doses of hydrocortisone (24.0 ± 7.6 vs 19.3 ± 5.7 mg, P =.0016) and experienced more frequent ACs (11.1 vs 2.49/100 patient-years, P =.0389) than alive patients. Conclusions: This is the first study to provide detailed characteristics of deceased patients with AI. Older, male patients with SAI and frequent AC had a high mortality risk.