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%)