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. 2007 Jun 20;48(3):379–388. doi: 10.3349/ymj.2007.48.3.379

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Copyright © 2007 The Yonsei University College of Medicine

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2 — Age-related basal DHEA level changes in saliva (A) and serum (B). Samples were collected at 10 to 11AM. Cortisol levels in 358 paired saliva and serum samples were determined with RIA. Each point on the figure represents cortisol levels of a participant. The relative DHEA ratio of serum to saliva is depicted in (C). The indicated line represents the best fit linear regression with age. Predicted salivary DHEA level (nmol/L) = 1.009-0.007x, beta = -0.21, p #x003C; 0.001, n = 356; predicted serum DHEA level (nmol/L) = 27.9-0.197x, beta = -0.25, p #x003C; 0.001, n = 359; predicted saliva/serum ratio = 3.58+0.0016x, beta = 0.18, p = 0.73, n = 359.