Table 2.

Thyroid parameters in two groups of patients with high FT4/low FT3 versus low FT4/high FT3 serum concentrations.

Parameter	High FT4/low FT3 median (IQR) n = 24	Low FT4/high FT3 median (IQR) n = 33	p-value
Weight-adjusted LT4 dose (µg/kg BW/day)	2.02 (1.68; 2.31)	1.63 (1.40; 2.26)	0.10
FT3 (pmol/l)	3.84 (3.65; 4.00)	5.93 (5.74; 6.20)	<0.001
FT4 (pmol/l)	27.2 (26.3; 28.9)	18.1 (17.0; 18.8)	<0.001
TSH (mIU/l)	0.12 (0.02; 0.23)	0.11 (0.02; 0.43)	0.81
Deiodinase activity (nmol/s)	12.5 (11.7; 13.7)	31.2 (29.2; 33.5)	<0.001

BW, body weight; FT3, free triiodothyronine; FT4, free thyroxine; LT4, levothyroxine; TSH, thyroid stimulating hormone.