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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: Am J Obstet Gynecol. 2020 Jul 9;224(1):82.e1–82.e8. doi: 10.1016/j.ajog.2020.06.052

Table 2.

Urinary Iodine Concentration (μg/L) by Trimester Among Eligible ARCH Participants (n=464 women, n=1,014 urine specimens)1

Trimester n2 Median3 Mean Std Dev Min Max
First 305 171 199 130 15 712
Second 366 181 227 206 6 2580
Third 343 179 222 174 4 1330
1

Abbreviations: ARCH=Archive for Research in Child Health

2

Number of specimens; some women contributed more than one specimen per trimester

3

Kruskall-Walllis test for equality of medians shows no significant difference by trimester (p=.50)