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. 2022 Nov 10;8(6):516–522.

Table 2. Urinary iodine concentration in pregnant women from Yongchuan, Chongqing, stratified by trimester.

Trimester N Median (µg/L) < 150 µg/L (%) 150 – 249 µg/L (%) 250 – 499 µg/L (%) ≥ 500 µg/L (%)
1st 100 187.5a 32a 47 10 11
2nd 100 211.8a 30a 46 16 8
3rd 100 239.9 18 48 18 16

Data are reported as median for continuous variables and as a percentage for categorical variables.

a

Compared to the 3rd trimester, P < 0.05 (Kruskal–Wallis).