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Table 2 Statistical analysis of scalp hair element concentrations stratified on sex and age

From: Age- and sex-dependence of five major elements in the development of human scalp hair

 Correlation analysisLinear regression analysis
ElementSexPearson coefficientp-valueEquationS. E.R2, %
SM0.0030.97139,094 + 0.100*yr814.80.0
F−0.1810.01939,160–7.331*yr954.53.3
CaM0.458<0.001412.1 + 3.272*yr170.320.9
F0.521<0.001560.9 + 6.915*yr270.927.2
MgM0.447<0.00139.92 + 0.310*yr16.6220.0
F0.495<0.00156.33 + 0.651*yr27.3224.5
ZnM0.341<0.001132.9 + 0.297*yr21.9211.6
F0.0680.378145.7 + 0.067*yr23.630.5
CuM−0.0450.61418.86–0.016*yr9.4700.2
F−0.0770.31824.42–0.037*yr11.290.6
  1. S. E. indicates standard error