Anthropometrics and biochemical markers in men

Area of Science:

• Endocrinology and Metabolism
• Bone Biology and Osteoporosis Research

Background:

• The interplay between anthropometric measurements and bone metabolism biochemical markers is not well-established.
• Understanding these relationships is crucial for assessing bone health, particularly in aging male populations.

Purpose of the Study:

• To investigate the association between various anthropometric factors and biochemical markers of bone metabolism in men aged 40-70.
• To determine the predictive value of anthropometrics and specific bone turnover markers for bone mineral density (BMD).

Main Methods:

• A population-based cohort of 145 men (40-70 years) was studied.
• Anthropometric measurements included weight, BMI, body fat percentage, and fat-free metrics.
• Biochemical markers assessed were serum procollagen amino-terminal propeptide (PINP) and urinary amino-terminal telopeptide (NTx).

Main Results:

• Fat-free BMI showed the strongest association with bone metabolism markers (r = -0.21 to -0.35, p < 0.05).
• Body fat percentage did not correlate with bone mineral density (BMD) at the spine or femoral neck.
• Urinary NTx was a significant indicator of current BMD, outperforming PINP and the PINP/NTx ratio (r = -0.20 to -0.29).

Conclusions:

• Fat-free mass, assessed by fat-free BMI, plays a significant role in bone metabolism in middle-aged and older men.
• Urinary NTx levels are a more effective marker for assessing current bone status and identifying osteoporosis risk than PINP or their ratio.
• NTx levels differed significantly between men with normal and osteoporotic BMD at the femoral neck.