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Table 3 Correlation study among various research parameters in patient and control groups

From: Alterations of serum macro-minerals and trace elements are associated with major depressive disorder: a case-control study

Correlation parameters Patient group Control group
  r p r p
Fe and Mn −0.031 0.630 −0.021 0.743
Fe and Zn 0.025 0.698 0.003 0.963
Fe and Cu 0.045 0.479 < 0.001 0.999
Fe and Ca −0.070 0.272 0.006 0.919
Fe and Mg −0.032 0.619 0.049 0.438
Fe and Se −0.121 0.058 0.017 0.788
Mn and Zn −0.184 0.004a 0.086 0.178
Mn and Cu −0.171 0.007a −0.275 < 0.001a
Mn and Ca 0.041 0.518 −0.030 0.641
Mn and Mg 0.155 0.015 0.266 < 0.001a
Mn and Se 0.059 0.357 −0.006 0.927
Zn and Cu 0.079 0.219 < 0.001 0.995
Zn and Ca −0.035 0.589 0.072 0.260
Zn and Mg 0.032 0.613 −0.042 0.506
Zn and Se −0.012 0.852 0.047 0.458
Cu and Ca −0.043 0.505 0.093 0.145
Cu and Mg 0.078 0.220 −0.240 < 0.001a
Cu and Se −0.175 0.006a −0.008 0.905
Ca and Mg −0.018 0.774 −0.004 0.952
Ca and Se −0.004 0.944 −0.031 0.623
Mg and Se 0.145 0.023 −0.051 0.424
  1. r = Correlation co-efficient; p = Significance; Negative values specify opposite correlation
  2. a Correlation is significant at 0.05 level (two-tailed)