| Daily variation of lipids and hormones in sera of healthy subjects, Hammond J, Wentz P, Statland BE, Phillips JC and Winkel P, 1976, Clin Chim Acta, 73, 347-52 | 26.6 | 53.1 | Mixed | Healthy (excl pregnant) | Serum |
| Components of biological variation, including seasonality, in blood concentrations of TSH, TT3, FT4, PRL, cortisol and testosterone in healthy volunteers, Maes M, Mommen K, Hendrickx D, Peeters D, D’Hondt P, Ranjan R, De Meyer F and Scharpé S, 1997, Clin Endocrinol, 46, 587-98 | 21.7 | 46.2 | Mixed | Healthy (excl pregnant) | Plasma |
| Biological day-to-day variation and reference change limits of serum cortisol and aldosterone in healthy young men on unrestricted diets., Ahokoski O, Virtanen A, Kairisto V, Scheinin H, Huupponen R, Irjala K, 1999, Clin Chem, 45(7), 1097-9 | 13.0 | 12.0 | Males | Healthy (excl pregnant) | Serum |
| Salivary cortisol on ROCHE Elecsys immunoassay system: pilot biological variation studies, Chiu SK, Collier CP, Clark AF and Wynn-Edwards KE, 2003, Clin Biochem, 36, 211-14 | 6.3 | 20.5 | Mixed | Healthy (excl pregnant) | Salivary |
| Day-to-day variation of late-night salivary cortisol in healthy voluntaries, Casals G, Foj L, Martínez de Osaba MJ, 2011, Clin Biochem, 44, 665-8 | 30.4 | 35.3 | Mixed | Healthy (excl pregnant) | Salivary |
| Day-to-day variation of late-night salivary cortisol in healthy voluntaries, Casals G, Foj L, Martínez de Osaba MJ, 2011, Clin Biochem, 44, 665-8 | 32.1 | 38.1 | Mixed | Healthy (excl pregnant) | Salivary |
| Seasonal and biological variation of urinary epinephrine, norepinephrine, and cortisol in healthy women, Hansen AM, Garde AH, Skovgaard LT and Chistensen JM, 2001, Clin Chim Acta, 309, 25-35 | 59.0 | 26.0 | Females | Healthy (excl pregnant) | Urine |
| Seasonal and biological variation of urinary epinephrine, norepinephrine, and cortisol in healthy women, Hansen AM, Garde AH, Skovgaard LT and Chistensen JM, 2001, Clin Chim Acta, 309, 25-35 | 124.0 | 36.0 | Females | Healthy (excl pregnant) | Urine |
| Seasonal and biological variation of urinary epinephrine, norepinephrine, and cortisol in healthy women, Hansen AM, Garde AH, Skovgaard LT and Chistensen JM, 2001, Clin Chim Acta, 309, 25-35 | 61.0 | 21.0 | Females | Healthy (excl pregnant) | Urine |
| Quality goals for hormone testing, Ricós C and Arbós MA, 1990, Ann Clin Biochem, 27, 353-8 | 15.2 | 38.1 | Mixed | Healthy (excl pregnant) | Unknown |
| Evaluation of serum cortisol biological variation in the evening withdrawal, Dittadi R, Damiani AF and Olcese C, 2018, Clin Chem Lab Med, 55(12), e285-e287 | 30.9 | 31.3 | Mixed | Healthy (excl pregnant) | Serum |
| Biological day-to-day variation and reference change limits of serum cortisol and aldosterone in healthy young men on unrestricted diets., Ahokoski O, Virtanen A, Kairisto V, Scheinin H, Huupponen R, Irjala K, 1999, Clin Chem, 45(7), 1097-9 | 13.0 | 12.0 | Males | Healthy (excl pregnant) | Serum |
