Table 5. Incidence of thyroid diseases with different urinary iodine concentrations in pregnant women from Yongchuan, Chongqing.
| Thyroid diseases | UIC group | |||
|---|---|---|---|---|
|
| ||||
| <150 µg/L | 150 – 249 µg/L | 250 – 499 µg/L | ≥500 µg/L | |
| Clinical hypothyroidism | 4 (5.00) | 1 (0.71) | 2 (4.50) | 3 (8.5) |
| Subclinical hypothyroidism | 5 (6.25) | 1 (0.71) | 0 (0.00) | 0 (0.00) |
| Clinical hyperthyroidism | 1 (1.25) | 0 (0.00) | 0 (0.00) | 0 (0.00) |
| Subclinical hyperthyroidism | 3 (3.75) | 1 (0.71) | 0 (0.00) | 1 (2.86) |
| Isolated hypothyroxinemia | 18 (22.5) | 7 (4.96) | 7 (15.91) | 5 (14.29) |
| Total | 31 (38.8) | 10 (7.10) | 9 (20.45) | 9 (25.71) |
| P-value | 0.000 | – | 0.011 | 0.001 |
Data are expressed as n (%). Groups were compared to the adequate iodine intake group (orange) using a Chi-square test with respect to the overall incidence of thyroid diseases.