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Table 3 The association between perchlorate, iodine and thyroid tumors and nodular goiter by conditional logistic model

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

Variables Total cases NG PTMC PTC
ORs (%95CI) P-value ORs (%95CI) P-value ORs (%95CI) P-value ORs (%95CI) P-value
N (case/control) 184/184   72/72   46/46   66/66  
Perchlorate 1.041 (1.017, 1.066) 0.001 1.034 (0.994, 1.074) 0.094 1.033 (0.996, 1.072) 0.084 1.058 (1.009, 1.110) 0.021
Iodine 1.000 (1.000, 1.000) 0.759 1.002 (0.998, 1.005) 0.303 1.000 (0.998, 1.001) 0.596 1.000 (0.999, 1.002) 0.518
  1. Note: Perchlorate and iodine were corrected by urinary specific gravity (USG). Perchlorate, iodine, BMI, smoking, and drinking were included in the model. OR odds ratio, CI confidence interval, NG nodular goiter, PTMC papillary thyroid micro carcinoma, PTC papillary thyroid carcinoma, Total cases including NG, PTMC and PTC