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Table 3 Thyroid function of patients (n = 16) with levothyroxine treatment whose initial TSH and T4-V level information was present in patient records

From: Excess use of thyroid hormone treatment among patients with fibromyalgia: a cross-sectional study in primary health care

Patient

Daily thyroxine dose (μg)

TSH (mU/l) before threatment

T4-V (pmol/l) before treatment

Current TSH (mU/l)

Current T4-V (pmol/l)

Year of hypothyroidism, dg

1 overt hypothyroidism

75

7.3

10.0

2.5

13.6

2012

2 subclinical hypothyroidism

37.5

7.9

11.2

1.4

15.1

2012

3 subclinical hypothyroidism

93

7.1

11.0

0.31

19.1

2008

4 subclinical hypothyroidism

75

6.7

13.8

3.2

15.7

2004

5 subclinical hypothyroidism

50

5.7

13.0

2.5

16.0

2016

6 subclinical hypothyroidism

50

4.9

13.7

2.6

18.6

2011

7 subclinical hypothyroidism

50

4.4

14.1

2.8

14.1

2014

8 central hypothyroidism

75

2.6

10.8

0.78

19.3

2012

9 central hypothyroidism

125

2.6

10.7

1.3

11.6

2012

10 central hypothyroidism

71

0.24

10.9

0.18

14.2

2011

11 normal thyroid function

50

3.5

12.1

1.6

16.2

2013

12 normal thyroid function

100

1.6

16.6

1.2

16.0

2015

13 normal thyroid function

50

1.9

12.6

1.3

13.6

2013

14 normal thyroid function

150

4.2

11.9

0.01

20.2

2012

15 normal thyroid function

100

1.2

13.9

0.87

20.3

2014

16 normal thyroid function

25

1.1

11.0

0.87

13.9

2016

Mean (p-value)

73.5

3.9

12.3

1.5 (< 0.001)

16.1 (< 0.001)

 

Median

73

3.83

12

1.3

15.85

 
  1. Overt hypothyroidism (TSH > 4.2 mU/l and T4-V < 11.0 pmol/l), subclinical hypothyroidism (TSH > 4.2 mU/l and T4-V = 11.0–22.0 pmol/l), central hypothyroidism (TSH = 0.27–4.2 mU/l and T4-V < 11.0 pmol/l), normal thyroid function (TSH = 0.27–4.2 mU/l and T4-V = 11.0–22.0 pmol/l). Paired samples T-test was used to determine the statistical significance for chance of TSH values and T4-V values