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Calculated bioavailable testosterone levels and depression in middleaged men

 

 

 

 

Psychoneuroendocrinology. 2006 Aug 12;

 

Calculated bioavailable testosterone levels and depression in middle-aged men.

 

McIntyre RS, Mancini D, Eisfeld BS, Soczynska JK, Grupp L, Konarski JZ, Kennedy SH. Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Department of Pharmacology, University of Toronto, Toronto, ON, Canada; Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada.

 

BACKGROUND: The association between circulating total testosterone (TT) levels and depressive symptoms remains unclear. We sought to determine the relationship between physiologically active bioavailable testosterone (BT) and depressive symptoms in middle-aged men with and without major depressive disorder (MDD). METHODS: We assessed and compared calculated BT levels in two groups of middle-aged men (40-65 years): untreated subjects meeting DSM-IV-TR-defined criteria for a major depressive episode as part of major depressive disorder (N=44) and a matched non-depressed control group (N=50). RESULTS: Depressed men had lower mean BT levels (3.51+/-1.69 vs. 4.69+/-2.04nmol/L; p=0.008) and TT levels (11.94+/-4.63 vs. 17.64+/-1.02nmol/L; p<0.001) when compared to the control group. Biochemical hypogonadism (i.e., BT level2.4nmol/L or TT level12.14nmol/L) was also more prevalent in depressed men vs. non-depressed controls (34% vs. 6%, p<0.001; 61% vs. 14%, p<0.001, respectively). CONCLUSIONS: Changes in physiologically active BT concentration may be a vulnerability factor for depressive symptoms in middle-aged depressed men.

 

PMID: 16908107 [PubMed - as supplied by publisher]

 

 

 

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