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Table 5 Correlation between perchlorate and thyroid function under different iodine levels

From: The risk of perchlorate and iodine on the incidence of thyroid tumors and nodular goiter: a case-control study in southeastern China

Indicators β %95 CI for β P-value
With inadequate iodine levels (n = 53)
 TSH 0.020 (−0.13, 0.17) 0.799
 TT3 0.013 (−0.059, 0.086) 0.721
 TT4 3.80 (−0.87, 8.47) 0.118
 FT3 −0.041 (−0.14, 0.059) 0.429
 FT4 0.020 (−0.022, 0.062) 0.358
 TPOAb 0.41 (−0.037, 0.86) 0.079
 TgAb 0.14 (−0.08, 0.35) 0.226
With adequate iodine levels (n = 87)
 TSH 0.19 (0.040, 0.33) 0.015
 TT3 −0.013 (−0.082, 0.056) 0.715
 TT4 2.46 (−2.00, 6.92) 0.283
 FT3 −0.091 (− 0.19, 0.0044) 0.065
 FT4 0.011 (−0.032, 0.055) 0.609
 TPOAb −0.18 (−0.55, 0.19) 0.349
 TgAb 0.021 (−0.25, 0.29) 0.883
With more than adequate or excess iodine levels (n = 71)
 TSH 0.029 (−0.17, 0.23) 0.774
 TT3 −0.071 (−0.14, 0.0021) 0.061
 TT4 −2.55 (−7.88, 2.79) 0.353
 FT3 −0.12 (−0.23, − 0.0049) 0.045
 FT4 0.025 (−0.015, 0.066) 0.224
 TPOAb 0.10 (−0.31, 0.51) 0.620
 TgAb 0.37 (0.023, 0.71) 0.041
  1. Note: Perchlorate and iodine were corrected by urinary specific gravity (USG); Perchlorate, iodine, gender, age, BMI, smoking, and drinking were included in the model. Perchlorate, iodine, TSH, TPOAb and TgAb were natural logarithm conversion. CI confidence interval, TSH thyroid stimulating hormone, TT3 triiodothyronine; TT4 thyroxine, FT3 free triiodothyronine, FT4 free thyroxine, TPOAb thyroid peroxidase antibody, TgAb thyroglobulin antibody