Table 1.
Demographic characteristics of adults in three areas.
| Characteristics | Maxi (iodine-adequate group) | Xiwenzhuang (iodine-sufficient group) | Gaoche (iodine-excess group) |
|---|---|---|---|
| N | 324 | 286 | 291 |
| Sex (N) | |||
| Male | 132 | 90 | 135 |
| Female | 192 | 196 | 156 |
| Age | |||
| Mean ± SD | 46 ± 10 | 52 ± 13 | 45 ± 12 |
| Range | 19–70 | 18–80 | 20–66 |
| BMI | |||
| Mean ± SD | 24.91 ± 3.51 | 25.30 ± 3.45 | 25.24 ± 3.61 |
| UIC (μg/L) | |||
| P50 | 126.90 | 218.60∗ | 418.65# |
| P25-P75 | 87.70–209.08 | 146.80–302.60 | 277.90–605.85 |
| TgAb-positive rate % (n/N) | 13.58 (44/324) | 15.73 (45/286) | 9.97 (29/291) |
| TPOAb-positive rate % (n/N) | 10.19 (33/324) | 11.89 (34/286) | 9.28 (27/291) |
| TgAb- and TPOAb-positive rate % (n/N) | 5.86 (19/324) | 6.64 (19/286) | 5.50 (16/291) |
| AITD prevalence % (n/N) | 17.90 (58/324) | 20.98 (60/286) | 13.75 (40/291) |
BMI: body mass index; UIC: urinary iodine concentration. ∗Compared with the iodine-adequate group, median urinary iodine value was significantly higher in the iodine-sufficient group (Z = −8.291, p < 0.001). #Compared with the iodine-adequate group, median urinary iodine value was significantly higher in the iodine-excess group (Z = −15.194, p < 0.001).