Table 2 The salt iodine concentration of sampling site and urinary iodine concentration of subjects in year 2011 and 2013 stratified by administrative divisions
2011 | 2013 | Z | p | |||
|---|---|---|---|---|---|---|
City | Salt Median (mg/kg) | Urinary iodine concentration Median (range) (μg/L) | Salt Median (mg/kg) | Urinary iodine concentration Median (range) (μg/L) | ||
Hangzhou | 27.7 | 199.0 (648.1) | 23.1 | 187.2 (936.5) | −0.665 | 0.506 |
Ningbo | 27.0 | 254.9 (589.6) | 23.3 | 154.8 (802.1) | −4.115 | 0.000 |
Wenzhou | 27.8 | 232.6 (780.1) | 23.9 | 151.8 (511.7) | −4.957 | 0.000 |
Jiaxing | 27.0 | 205.5 (370.3) | 23.9 | 175.9 (709.8) | −1.697 | 0.090 |
Huzhou | 27.4 | 310.5 (233.0) | 23.6 | 159.2 (488.6) | −4.111 | 0.000 |
Shaoxing | 28.2 | 176.8 (396.0) | 23.9 | 138.0 (324.0) | −2.321 | 0.020 |
Jinhua | 29.2 | 243.0 (425.6) | 24.6 | 192.2 (670.3) | −2.995 | 0.003 |
Quzhou | 31.9 | 267.6 (479.3) | 25.5 | 205.0 (488.5) | −1.808 | 0.071 |
Zhoushan | 25.8 | NR | 24.0 | 170.6 (574.8) | NR | NR |
Taizhou | 28.2 | 298.2 (708.1) | 24.3 | 210.2 (551.0) | −3.199 | 0.001 |
Lishui | 31.7 | 452.2 (726.2) | 26.1 | 243.7 (693.7) | −4.109 | 0.000 |
Total | 30.5 | 237.1 (862.3) | 24.1 | 174.3 (586.0) | −9.119 | 0.000 |