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Study of the relationship between FT3, FT4, and TSH with bone resorption indices in men with hypothyroidism.

AIM
This study aimed to find the effect of hypothyroidism in men on metabolism and bone mineral density.


METHOD
The study included a patients group of 90 men suffering from hypothyroidism and 120 healthy subjects as a control group. The study comprised the estimation of the concentration of Blood free triiodothyronine (FT3), free thyroid hormone (FT4), thyroid stimulating hormone (TSH), bone resorption index type I collagen C-terminal peptide (CTX-1), the serum calcium (Ca2+), serum phosphorus (Pi3+), the bone mineral density of the lumbar spine and femoral neck.


RESULTS
In the hypothyroidism men group: (1) the bone mass was lower than the control group with significant differences, (2) the bone resorption index CTX-1 was significantly higher than that in the control group and calcium and phosphorus were not different from those in healthy control subjects, and (3) TSH was positively correlated with CTX-1. Male TSH and CTX-1 levels were positively correlated.


CONCLUSIONS
There is bone loss in men with hypothyroidism, which may be related to increased bone resorption.