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Table 4 Overview of endocrinological parameters measured from blood samples during three different timepoints

From: Study protocol of comprehensive risk evaluation for anorexia nervosa in twins (CREAT): a study of discordant monozygotic twins with anorexia nervosa

Analysis Sample 1
Day 1 (T1) 3:30 pm
Sample 2
Day 2
8:00 am
Sample 3
Day 2
10:00 am
Sample type
Hypothalamic–pituitary–adrenal axis  
 Adrenocorticotropic hormone (ACTH) X X X Plasma
 Cortisol X X X Serum
Hypothalamic–pituitary–thyroid axis
 Thyroid-stimulating hormone (TSH) (X) X   Serum
 Free triiodothyronine (fT3) (X) X   Serum
 Free thyroxine (fT4) (X) X   Serum
Hypothalamic–pituitary–gonadal axis
 Follicle stimulating hormone (FSH)   X   Serum
 Luteinizing hormone (LH)   X   Serum
 Dehydroepiandrosterone (DHEAS)   X   Serum
 Sex hormone-binding globulin (SHBG)   X   Serum
 Testosterone   X   Serum
Hypothalamic–pituitary–somatotropic axis
 Insulin-like growth factor 1 (IGF-1) X X   Serum
 Insulin-like growth factor-binding protein 1 (IGFBP-1) X X   Serum
 Insulin-like growth factor-binding protein 3 (IGFBP-3) X X   Serum
Gastrointestinal hormones
 Acyl/deacyl-ghrelin X X X Plasma
 Adiponectin (ADIP) X X X Serum
 Leptin   X   Serum
 Sodium X   X Plasma
 Sodium X   X Urine