From: Geographical influences on the iodine status in pregnant women, neonates, and school-age children in China
Category of household salt for cooking
Median (IQR), μg/L
Inland
Coast
Iodized
135.4 (85.1–205.1)1,3
133.0 (78.5–196.2)2**
Non-iodized
127.8 (75.2–180.5)4*
93.7 (60.2–136.7)
Total
134.9 (85.0–203.0)
113.0 (69.5–180.1)