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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