Table 1 Characteristics of the study population.

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

 

TSH in reference range (n = 5056)

Low TSH (n = 435)

High TSH (n = 165)

Age; years

52 (41; 64)

62 (50; 71)

47 (34; 62)

Males

2612 (51.7%)

240 (55.2%)

60 (35.4%)

Smoking status

Former

1899 (37.6%)

183 (42.1%)

59 (35.8%)

Current

1319 (26.1%)

103 (23.7%)

50 (30.3%)

Body mass index; kg/m2

27.4 (24.5; 30.8)

27.7 (25.0; 31.3)

26.5 (22.5; 30.4)

Waist circumference; cm

91 (81; 101)

93 (83; 104)

87 (76; 98)

Fat mass; kg

22.1 (17.2; 28.4)

22.3 (17.1; 28.1)

21.0 (16.4; 28.7)

Fat-free mass; kg

56.2 (47.1; 66.8)

57.4 (47.7; 66.3)

51.4 (45.4; 63.2)

Body cell mass; kg

29.0 (23.9; 36.0)

28.9 (23.3; 34.7)

26.2 (23.1; 33.6)

Systolic blood pressure; mmHg

129 (116; 141)

132 (119; 145)

123 (113; 138)

Diastolic blood pressure; mmHg

78 (71; 85)

77 (70; 85)

77 (69; 83)

SPINA-GT

3.35 (2.66; 4.25)

9.04 (7.65; 12.48)

1.54 (1.36; 1.78)

SPINA-GD

32.8 (29.6; 36.2)

31.7 (28.3; 35.3)

35.0 (32.0; 39.7)

Jostel’s TSH index

1.96 (1.62; 2.28)

0.81 (0.47; 1.06)

3.10 (2.91; 3.39)

  1. Continuous data is expressed as median, 25th, and 75th percentile; categorical data as absolute numbers and %
  2. SPINA-GT thyroid's secretory capacity.
  3. SPINA-GD sum activity of step-up deiodinases.
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