Table 2 UIC analysed according to participating regions.
From: Iodine Deficiency in Zhejiang Pregnant Women in the Context of Universal Salt Iodization Programme
Trimester | Region | n | Median UIC (μg/L) | P |
|---|---|---|---|---|
1st | Coastal | 870 | 127.17 (79.93–193.07) | 0.023*, 0.028 |
Sub-coastal | 1085 | 133.05 (89.35–199.41) | ||
Inland | 565 | 134.95 (82.99–217.50) | ||
2nd | Coastal | 1684 | 119.74 (73.80–191.98) | 0.000*, 0.000 |
Sub-coastal | 1406 | 131.23 (85.13–193.52) | ||
Inland | 1171 | 150.69 (91.32–218.58) | ||
3rd | Coastal | 897 | 113.00 (75.32–173.69) | 0.000*, 0.000 |
Sub-coastal | 646 | 130.82 (83.49–196.00) | ||
Inland | 571 | 142.00 (95.86–225.34) | ||
Total | Coastal | 3310 | 119.38 (75.58–187.20) | 0.000*, 0.000* |
Sub-coastal | 3023 | 131.30 (85.66–196.00) | ||
Inland | 2228 | 146.00 (89.68–219.09) |



Mantel-Haenszel test of linear association was performed to test for linear trend.