. 2021 Nov 8;13(11):3975. doi: 10.3390/nu13113975

Table 2.

Comparison of TSH levels and UIC between ages in schoolchildren of Northeastern Mexico.

Age (yr)	UIC (μg/L) *	TSH (μUI/mL) *
5–6 (n = 31)	399 (253–700) ^a,b	4.2 (3.9–4.8) ^a
7 (n = 56)	341 (140–522) ^b	4.1 (3.8–4.6) ^a
8 (n = 36)	494 (259–694) ^a,b	4.1 (3.7–4.4) ^a
9 (n = 67)	415 (292–596) ^a,b	4.0 (3.8–4.4) ^a
10 (n = 57)	293 (369–707) ^a	4.0 (3.8–4.7) ^a
11 (n = 27)	613 (436–805) ^a	4.2 (3.8–4.5) ^a

* Median and interquartile range (IQR) 25th–75th. A Kruskal–Wallis test with a post–hoc Dunn test was performed, “a” and “b”superscripts (corresponding to 7, 10 and 11 years old) show significant differences (p < 0.05), meanwhile “a,b” superscripts (corresponding to 5–6, 8 and 9 years old) show not statistically differences.