Table 6.
Correlation Between Selenium, TSH, and Vitamin D Concentrations and Tumor Characteristics and Stage, After Adjusting for Age, Sex, and BMI
| Seleniuma Spearman correlation coefficient (p value) | Selenium (NMS) Spearman correlation coefficient (p value) | TSH Spearman correlation coefficient (p value) | Vitamin D Spearman correlation coefficient (p value) | |
|---|---|---|---|---|
| Tumor size | −0.09 (0.80) | −0.09 (0.60) | 0.25 (0.13) | 0.04 (0.82) |
| ETE | −0.10 (0.58) | −0.10 (0.57) | 0.20 (0.24) | 0.02 (0.91) |
| Multifocality | −0.08 (0.63) | −0.08 (0.63) | 0.04 (0.83) | −0.04 (0.84) |
| Number of foci | −0.17 (0.30) | −0.17 (0.30) | 0.15 (0.36) | −0.07 (0.69) |
| Number of positive LN | 0.08 (0.62) | 0.08 (0.62) | 0.42 (0.011) | 0.16 (0.35) |
| Distant metastases | −0.26 (0.12) | −0.26 (0.12) | 0.23 (0.18) | −0.22 (0.19) |
| NTCTCSG stage | −0.41 (0.011) | −0.41 (0.012) | 0.37 (0.022) | −0.08 (0.66) |
a
Using selenium concentrations from both labs without adjustment for laboratory reference range. Adjusted Spearman correlation coefficient is not applicable for Selenium (QUEST) due to the small sample size.