Lin HJ, et al. - Researchers determined how all-cause mortality in haemodialysis (HD) patients is influenced by the interactions of comorbidities and hypothyroidism. They used Cox proportional hazard regression and analyzed patients with hypothyroidism (ICD-9-CM 244.0, 244.1, and 244.9) and matched patients without hypothyroidism in the Registry for Catastrophic Illness Patient Database of Taiwan Health Insurance from 2000 to 2010. They found an association of hypothyroidism with increased all-cause mortality in chronic HD patients. They also noted that mortality risks in HD patients were influenced by the interaction of hypothyroidism and diabetes, but not other common comorbidities.