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Is there an association between fibromyalgia and below normal levels of urinary cortisol?





BMC Res Notes. 2008 Dec 22;1(1):134. [Epub ahead of print]


Is there an association between fibromyalgia and below-normal levels of urinary cortisol?


Izquierdo Alvarez S, Bocos Terraz JP, Bancalero Flores JL, Pavon Romero L, Serrano Ostariz E, Alegre de Miquel C.



BACKGROUND: Adynamia in fibromyalgia (FM) may be an expression of a functional deficit of the hypothalamic-pituitary-adrenal axis and be associated with below-normal levels of urinary cortisol. Our aim was to demonstrate that urinary cortisol was lower in patients with FM than in healthy subjects.


FINDINGS: We measured urinary cortisol levels for a sample of 47 women aged 29 to 64 years (mean age 53 years), diagnosed with FM 2-3 years previously, and compared the results with those for a control sample of 58 healthy women of a similar age. Samples of 24-hour urine were appropriately collected and levels of urinary cortisol were measured using the fluorescence polarization immunoassay method. The mean cortisol value for the women with FM was 65.40+/-27.10 microg/L, significantly lower than the mean cortisol level for the control group, at 90.83+/-38.17 microg/L (p < 0.001).


CONCLUSION: Our study confirms that women with FM have significantly lower urinary cortisol levels than healthy women.


PMID: 19102778 [PubMed - as supplied by publisher]










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