Table 1: Development of pain and stress biomarkers during inpatient rehabilitation measured by immunoassays.

Rehabilitation admission Rehabilitation discharge (3 weeks)
n Mean SD Median SEM Mean SD Median SEM p-value
ACTH (pg/ml) 123 51.3 32.7 39.7 3.0 50.5 28.9 41.4 2.6 n.s.
ß-Endorphin (pg/ml) 123 131.3 406.9 14.8 36.7 225.8 867.0 23.5 78.2 n.s.
Dynorphin (pg/ml) 123 4.3 6.2 1.9 0.6 4.1 6.0 2.2 0.5 n.s.
Serotonin (ng/ml) 124 123.3 66.5 114.2 6.0 120.0 71.1 109.9 6.4 n.s.

n: Number; ACTH: Adrenocorticotropic Hormone; SD: Standard Deviation; SEM: Standard Error of the Mean;

n.s: Not Significant.