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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