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Table 2 Percentiles for fT3 (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

Sex

n

percentiles

   

2.5

10

25

50

75

90

97.5

0 – 1 months

f

5

5.00

5.00

5.40

6.60

7.30

7.50

7.50

 

m

9

4.60

4.60

5.70

6.30

6.90

10.10

10.10

1–12 months

f

14

4.30

4.50

5.63

6.15

7.03

7.50

7.60

 

m

13

4.30

4.74

5.65

6.20

6.70

7.38

7.50

1–5 years

f

108

4.25

4.80

5.50

6.15

6.58

7.11

7.61

 

m

111

3.96

5.32

5.70

6.30

6.70

7.48

8.14

6–10 years

f

163

4.21

5.10

5.50

6.20

6.60

7.00

7.58

 

m

219

4.05

5.20

5.70

6.10

6.50

7.10

7.50

11–14 years

f

180

3.51

4.90

5.40

5.90

6.30

6.80

7.30

 

m

252

4.63

5.20

5.60

6.00

6.40

6.80

7.20

15–18 years

f

98

3.50

4.48

4.80

5.30

5.83

6.50

6.90

 

m

211

4.20

5.00

5.40

5.80

6.20

6.60

7.47