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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