Table 2 Associations between serum TSH levels and markers of body composition.

From: Low serum TSH levels are associated with low values of fat-free mass and body cell mass in the elderly

 

TSH; mIU/L β (95%-CI)

0.49 ≤ TSH < 3.29 β (95%-CI)

TSH < 0.49 β (95%-CI)

TSH ≥ 3.29 β (95%-CI)

Body mass index; kg/m2

0.16 (0.06; 0.27)*

Reference

 − 0.31 (− 0.76; 0.16)

 − 0.15 (− 0.88; 0.59)

Waist circumference; cm

0.35 (0.08; 0.62)*

Reference

 − 0.65 (− 1.81; 0.52)

 − 0.17 (− 1.99; 1.66)

Fat mass; kg

0.32 (0.12; 0.52)*

Reference

 − 0.47 (− 1.34; 0.41)

0.12 (− 1.24; 1.49)

Fat-free mass; kg

0.11 (− 0.06; 0.28)

Reference

 − 0.28 (− 1.01; 0.44)

 − 0.25 (− 1.39; 0.88)

Body cell mass; kg

0.02 (− 0.08; 0.12)

Reference

 − 0.32 (− 0.76; 0.12)

 − 0.54 (− 1.23; 0.14)

  1. Association between TSH and markers of body composition were analyzed by linear regression models adjusted for age, sex, smoking status and study. We calculated two models for each outcome – the first with continuous TSH and the second with TSH categorized into three groups with 0.49 ≤ TSH < 3.29 as reference category.
  2. CI confidence interval.
  3. *p < 0.05.
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