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Table 2 Mean thyroid stimulating hormone and free T4 levels based on subject BMI group

From: Elevated serum TSH concentrations are associated with higher BMI Z-scores in southern Iranian children and adolescents

   

Underweight

Healthy weight

Overweight

Obese

P

All ages

All (850)

TSH

2.89 ± 1.64

3.05 ± 1.85

3.22 ± 1.77

3.53 ± 2.13

0.005*

FT4

1.41 ±

0.24

1.43 ±

0.25

1.39 ±

0.27

1.39 ±

0.26

0.221

Male (365)

TSH

2.78 ±

1.55

3.16 ±

1.77

3.145 ±

1.69

3.75 ± 1.94

0.002*

FT4

1.41 ± 0.23

1.41 ± 0.24

1.30 ± 0.26

1.42 ± 0.23

0.040*

Female (485)

TSH

3.02 ± 1.75

3.00 ± 1.90

3.27 ± 1.83

3.31 ± 2.28

0.457

FT4

1.40 ± 0.25

1.44 ± 0.26

1.44 ± 0.26

1.36 ± 0.28

0.045*

2–9 year olds

All (429)

TSH

2.79 ± 1.58

2.98 ±

1.62

3.24 ±

1.83

3.64 ±

2.18

0.005*

FT4

1.44 ± 0.25

1.45 ± 0.24

1.44 ± 0.25

1.40 ± 0.27

0.450

Male (155)

TSH

2.71 ± 1.66

3.34 ± 1.84

2.23 ± 1.37

4.05 ± 1.82

0.003*

FT4

1.45 ± 0.24

1.47 ± 0.21

1.44 ± 0.19

1.43 ± 0.23

0.872

Female (274)

TSH

2.88 ± 1.50

2.81 ± 1.48

3.43 ± 1.86

3.37 ± 2.36

0.084

FT4

1.42 ± 0.25

1.44 ± 0.25

1.44 ± 0.26

1.38 ± 0.29

0.504

10-18 year olds

All (421)

TSH

3.03 ± 1.72

3.15 ± 2.10

3.21 ± 1.74

3.44 ± 2.09

0.521

FT4

1.36 ± 0.23

1.41 ± 0.27

1.36 ± 0.27

1.38 ± 0.25

0.463

Male (210)

TSH

2.88 ± 1.41

2.99 ± 1.70

3.33 ± 1.70

3.58 ± 2.00

0.138

FT4

1.36 ± 0.21

1.36 ± 0.26

1.27 ± 0.26

1.41 ± 0.23

0.057

Female (211)

TSH

3.24 ± 2.11

3.26 ± 2.34

3.09 ± 1.80

3.24 ± 2.20

0.984

FT4

1.36 ± 0.25

1.44 ± 0.27

1.44 ± 0.26

1.34 ± 0.27

0.087

  1. Abbreviations: BMI, body mass index; TSH, thyroid stimulating hormone; FT4, free T4