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Table 1 Median (95% intervals) of serum TSH, T4 and T3 levels according to age and gender in Khartoum, Sudan

From: Reference intervals of thyroid hormones in Khartoum, Sudan

Age groups, in years Number TSH, mIU/L T4, nmol/L T3 mIU/L
20–30 63 1.3 (0.5–3.5) 71.0 (29.8–81.0) 1.4 (0.8– 2.6)
31–40 61 1.3 (0.5–3.3) 87.0 (82.0–91.0) 1.4 (0.8–2.3)
41–50 100 1.4 (0.5–3.1) 98.0 (92.0–106.9) 1.4 (0.8–2.7)
51–60 91 1.2 (0.4–2.8) 121.0 (109.0–130.0) 1.5 (0.8–2.7)
> 60 75 1.0 (0.4–2.8) 148.0 (132.8–185.2) 1.5 (0.9–2.5)
P   0.124 < 0.001 0.182
Gender
 Male 158 1.7 (0.5–3.4) 96.5 (62.0–148.2) 1.5 (0.8–2.9)
 Female 232 1.1 (0.5–3.0) 106.0 (63.0–165.0) 1.4 (0.8–2.4)
 P   < 0.001 < 0.001 0.161
 Total 390 1.2 (0.50–3.1) 103.0 (63.0–159.0) 1.4 (0.8–2.7)