Table 3.
Participants’ iodine-related knowledge according to region.
| Knowledge | Inland (N, %) | Coast (N, %) | p |
|---|---|---|---|
| 1. Is the iodine element essential to humans? | |||
| Yes◀ | 1072 (81.2) | 1134 (85.8) * | 0.001 |
| No | 78 (5.9) | 27 (2.0) ** | <0.001 |
| Don’t know | 171 (12.9) | 160 (12.1) | 0.577 |
| 2. Does IDD in pregnancy have adverse effects on fetal brain development? | |||
| Yes◀ | 1003 (75.9) | 924 (69.9) * | 0.001 |
| No | 24 (2.6) | 40 (3.0) | 0.479 |
| Don’t know | 284 (21.5) | 357 (27.0) * | 0.001 |
| 3. Does IDD in pregnancy have adverse effects on fetal growth? | |||
| Yes◀ | 1026 (77.7) | 951 (72.0) * | 0.001 |
| No | 24 (1.8) | 26 (2.0) | 0.710 |
| Don’t know | 271 (20.5) | 344 (26.0) * | 0.003 |
| 4. Can IDD be prevented? | |||
| Yes◀ | 1095 (82.9) | 1062 (80.4) | 0.173 |
| No | 19 (1.4) | 20 (1.5) | 0.762 |
| Don’t know | 207 (15.7) | 239 (18.1) | 0.132 |
| 5. What is the most efficient method to prevent IDD? | |||
| Consuming iodized salt◀ | 969 (73.4) | 880 (66.6) ** | <0.001 |
| Consuming seafood | 93 (7.0) | 193 (14.6) ** | <0.001 |
| Others | 259 (19.6) | 248 (18.8) | 0.582 |
| 6. What does the logo on the salt package indicate? | |||
| Nonsense | 28 (2.1) | 19 (1.4) | 0.312 |
| Salt has added iodine◀ | 919 (69.9) | 905 (68.5) | 0.402 |
| Don’t know | 374 (28.3) | 397 (30.1) | 0.252 |
| 7. Do you need to consume iodized salt? | |||
| Yes◀ | 279 (21.1) | 216 (16.4) * | 0.002 |
| No | 589 (44.6) | 720 (54.5) ** | <0.001 |
| Don’t know | 453 (34.3) | 385 (29.1) * | 0.004 |
| 8. Are you able to meet your iodine requirement when following a diet containing enough seafood but no iodized salt? | |||
| Yes | 249 (18.8) | 297 (22.5) * | 0.021 |
| No◀ | 807 (61.1) | 801 (60.6) | 0.225 |
| Don’t know | 265 (20.1) | 223 (16.9) * | 0.035 |
| 9. Do women in pregnancy need more iodine than in nonpregnancy? | |||
| Yes◀ | 717 (54.3) | 691 (52.3) | 0.334 |
| No | 253 (19.2) | 289 (21.9) | 0.083 |
| Don’t know | 351 (26.6) | 341 (25.8) | 0.658 |
| 10. Is the current iodine nutrition in Zhejiang pregnant women excessive? | |||
| Yes | 311 (23.5) | 356 (26.9) * | 0.044 |
| No◀ | 524 (39.7) | 541 (41.0) | 0.500 |
| Don’t know | 486 (36.8) | 424 (32.1) * | 0.011 |
◀: correct or desired answer. *: p < 0.05. **: p < 0.001.