Table 3.

Geometric means of serum hormone and urinary 6-sulfatoxymelatonin levels according to graveyard-shift work

Ever worked graveyard
P
No (n = 170)Yes (n = 7)
Estrone (pg/mL)11.5 (10.6-12.5)20.0 (13.6-29.4)0.006
Estradiol (pg/mL)2.3 (2.0-2.7)4.1 (2.1-8.0)0.11
Testosterone (ng/dL)11.8 (10.9-12.7)13.3 (9.1-19.3)0.54
DHEAS (ng/mL)925 (836-1,024)865 (534-1,401)0.79
aMT6-s (ng/mg creatinine)30.0 (26.9-33.5)33.8 (20.1-56.7)0.66
  • NOTE: Adjusted for age, BMI, smoking status, alcohol intake, group of subjects, and day length of the day previous to urine collection.