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Table 2 Distribution of cortisol levels by pain group

From: Hypothalamic-pituitary-adrenal stress axis function and the relationship with chronic widespread pain and its antecedents

Cortisol measures (nmol/l) Controls (N = 50) At risk (N = 251) CWP (N = 124)
  Median IQR Median IQR Median IQR
Saliva       
   Morning (nmol/l) 5 3–7 5 3–8 4 2–7
   Evening (nmol/l) 1 0.5–1 0.5 0.5–1 0.5 0.5–1
Serum       
   Post-physical exam (nmol/l) 295 229–362 310 215–387 331 240–410
   Post-suppression test (nmol/l) 249 154–313 232 133–368 253 144–388
  1. CWP, chronic widespread pain; IQR, inter-quartile range.