Table 1: Characteristics of the study population for both groups. Data are presented as frequency () and valid percent (%) or mean ± standard deviation.

VariableUS ()Germany () value

Sex
Female77 (91.7)59 (83.1)0.141
Male7 (8.3)12 (16.9)
Age (years)50.1 ± 13.7348.8 ± 13.640.555
Reason for hypercortisolism
Pituitary adenoma56 (66.7)71 (100.0)
Adrenal tumor21 (25.0)
Others7 (8.3)

aFisher’s exact test. Other reasons are pursuing ectopic or pituitary (), bilateral macronodular adrenal hyperplasia (), ectopic ACTH syndrome (), and steroid treatment ().