Table 5.

Comparison of our fT3 reference intervals to previously published reference intervals (2.5, 50 and 97.5%) of different age groups.

		Soldin et al., 1995 Abbott IMx®	Elmlinger et al., 2001 Immulite®	Hübner et al., 2002 Advia Centaur®	Kapelari et al., Advia Centaur®
	Age
fT3		[pmol/L]	[pmol/L]	[pmol/L]	[pmol/L]
		n = 1,069	n = 762	n = 460	n = 1,295
	1 d – 7 d	2.2 – 7.4	2.76 – 6.91 – 11.67	2.32 – 8.11 a	F: 5.00 – 6.60 – 7.50
	8 – 15 d	2.2 – 8.4	2.84 – 5.53 – 11.86	2.40 – 7.94 b	M: 4.60 – 6.30 – 10.10
	15 d – 1 m		n.d.
	1 – 12 m	3.1 – 10.6		2.72 – 5.27 – 7.30 c	F: 4.30 – 6.15 – 7.60
					M: 4.30 – 6.20 – 7.50
	1 – 2 y		3.28 – 6.08 – 11.06	3.05 – 5.63 – 6.93	F: 4.45 – 6.15 – 7.46
	2 – 3 y				M: 4.70 – 6.30 – 7.84
	3 – 4 y	3.7 – 10.3
	4 – 5 y		3.43 – 6.57 – 10.97
	5 – 6 y				F: 4.60 – 6.20 – 7.30
	7 – 8	4.4 – 9.2	3.58 – 6.71 – 10.75	3.30 – 5.58 – 6.79	M: 4.80 – 6.10 – 7.20
	9 – 10		3.72 – 6.44 – 10.87
	11		3.76 – 6.13 – 9.98
	12		3.76 – 5.88 – 8.86	3.46 – 5.54 – 6.7	F: 4.41 – 5.90 – 7.00
	13	4.8 – 9.1	3.84 – 5.64 – 8.03		M: 4.90 – 6.00 – 7.00
	14		3.81 – 5.45 – 7.28
	15		3.69 – 5.16 – 6.87
	16		3.61 – 4.98 – 6.88	3.57 – 5.33 – 6.65	F: 4.08 – 5.30 – 6.80
	17	5.4 – 8.8	3.54 – 4.76 – 6.60		M: 4.60 – 5.80 – 7.10
	18 – 19		3.52 – 4.65 – 6.30

^a 1 d – 3 d

^b 4 d – 30 d

^c 61 d – 12 m