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Table 4 Comparison of our TSH reference intervals to previously published reference intervals (2.5, 50 and 97.5%) of different age groups.

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

  

Soldin et al., 1995 Abbott IMx®

Zurakowski et al., 1999 DELFIA®

Elmlinger et al., 2001 Immulite®

Djemli et al., 2004 Access 2®

Hübner et al., 2002 Advia Centaur®

Kapelari et al., Advia Centaur®

 

Age

      

TSH

 

[mU/L]

[mU/L]

[mU/L]

[mU/L]

[mU/L]

[mU/L]

  

n = 533

n = 5,558

n = 762

n = 706

n = 460

n = 1,209

 

1 d – 7 d

F: 0.72 – 13.1

n.d.

1.79 – 4.63 – 9.69

F: 1.5 – 3.3 – 6.5

0.13 – 9.23 a

0.75 – 3.50 – 16.89

 

8 d–15 d

M: 0.52 – 16.0

n.d.

1.80 – 3.71 – 7.97

M: 0.7 – 2.4 – 9.8

0.16 – 8.48 b

 
 

15 d – 1 m

 

n.d.

n.d.

   
 

1 – 12 m

 

0.8 – 2.2 – 6.3

 

F: 1.0 – 2.4 – 5.7

0.3 – 1.73 – 5.88 c

1.30 – 2.85 – 7.09

 

1 – 2 y

  

0.63 – 2.04 – 4.12

M: 0.7 – 2.1 – 5.9

  
 

2 – 3 y

F: 0.46 – 8.1

F: 0.7 – 2.0 – 5.9

 

n.d.

0.42 – 1.98 – 4.79

1.00 – 2.70 – 5.42

 

3 – 4 y

M: 0.55 – 7.1

M: 0.7 – 2.1 – 6.0

 

n.d.

  
 

4 – 5 y

  

0.53 – 1.60 – 2.94

n.d.

  
 

5 – 6 y

F: 0.36 – 5.8

  

n.d.

  
 

7 – 8

M: 0.37 – 6.0

F: 0.6 – 1.8 – 5.1

0.80 – 1.86 – 3.48

n.d.

0.48 – 1.87 – 4.67

0.90 – 2.30 – 4.40

 

9 – 10

 

M: 0.7 – 1.9 – 5.4

0.85 – 2.00 – 3.50

F: 0.9 – 2.0 – 4.0

  
     

M: 1.0 – 1.9 – 3.7

  
 

11

  

0.85 – 1.90 – 3.33

   
 

12

 

F: 0.5 – 1.5 – 4.4

0.86 – 1.90 – 3.21

F: 0.7 – 1.7 – 3.4

0.53 – 1.78 – 4.58

0.90 – 2.10 – 4.10

 

13

 

M: 0.6 – 1.7 – 4.9

0.80 – 1.81 – 3.08

M: 0.8 – 1.8 – 3.9

  
 

14

  

0.76 – 1.70 – 2.83

   
 

15

  

0.70 – 1.56 – 2.55

   
 

16

  

0.64 – 1.54 – 2.51

F: 0.6 – 1.5 – 3.7

0.56 – 2.00 – 4.53

0.70 – 1.70 – 3.93

 

17

 

F: 0.5 – 1.3 – 3.9

0.62 – 1.51 – 2.42

M: 0.7 – 1.4 – 2.8

  
 

18 – 19

 

M: 0.5 – 1.6 – 4.4

0.52 – 1.36 – 2.36

n.d.

  
  1. a 1 d – 3 d
  2. b 4 d – 30 d
  3. c 61 d – 12 m