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Table 1 Numbers and ratio of different FT4 and TSH levels in patients with COVID-19 and low FT3 levels

From: Prognostic significance of low TSH concentration in patients with COVID-19 presenting with non-thyroidal illness syndrome

 

FT4

> 22 pmol/L

12–22 pmol/L

< 12 pmol/L

TSH

0.27–4.2 uIU/mL

7 (4.67%)

102 (68%)

14 (9.33%)

< 0.27 uIU/mL

4 (2.67%)

21 (14%)

2 (1.33%)

  1. FT3 free triiodothyronine, FT4 free thyroxine, TSH thyroid stimulating hormone