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Table 3 Percentiles for fT4 (pmol/L) of children and adolescents in different age groups.

From: Pediatric reference intervals for thyroid hormone levels from birth to adulthood: a retrospective study

Age

n

percentiles

  

2.5

10

25

50

75

90

97.5

0 – 1 months

23

8.50

8.98

13.50

20.10

24.70

28.48

30.50

1–12 months

45

9.17

13.10

14.00

15.50

17.20

19.22

25.28

1–5 Years

229

10.45

12.80

14.15

15.70

17.90

19.70

22.35

6–10 Years

327

10.60

12.80

14.40

15.90

17.30

18.90

20.90

11–14 Years

364

10.40

12.15

13.40

15.20

16,80

19.05

21.36

15–18 Years

233

10.57

11.74

13.50

15.20

16.90

18.80

22.62