Other hormone deficiencies in GPA-related PD were not as common as DI and hypogonadism, including hypothyroidism (28/70, 40.0%), hyperprolactinemia (21/70, 30.0%), adrenal deficiency (14/70, 20.0%), and GH/IGF-1 deficiency (7/70, 10.0%). Here, GH1 is linked to hyperprolactinemia.