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. 2019 Oct 7;13(3):221–226. doi: 10.15171/joddd.2019.034

Table 3. Pearson’s correlation coefficient between the variables iron, zinc, and vitamin B12 in the serum and saliva .

Variables Number Correlation coefficient P-value
Serum and saliva vitamin B 12 40 0.277 0.158
Serum and saliva iron 40 -0.059 0.717
Serum and saliva zinc 40 -0.210 0.193