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 analysis | Linear regression analysis | |||||
|---|---|---|---|---|---|---|
Element | Sex | Pearson coefficient | p-value | Equation | S. E. | R2, % |
S | M | 0.003 | 0.971 | 39,094 + 0.100*yr | 814.8 | 0.0 |
F | −0.181 | 0.019 | 39,160–7.331*yr | 954.5 | 3.3 | |
Ca | M | 0.458 | <0.001 | 412.1 + 3.272*yr | 170.3 | 20.9 |
F | 0.521 | <0.001 | 560.9 + 6.915*yr | 270.9 | 27.2 | |
Mg | M | 0.447 | <0.001 | 39.92 + 0.310*yr | 16.62 | 20.0 |
F | 0.495 | <0.001 | 56.33 + 0.651*yr | 27.32 | 24.5 | |
Zn | M | 0.341 | <0.001 | 132.9 + 0.297*yr | 21.92 | 11.6 |
F | 0.068 | 0.378 | 145.7 + 0.067*yr | 23.63 | 0.5 | |
Cu | M | −0.045 | 0.614 | 18.86–0.016*yr | 9.470 | 0.2 |
F | −0.077 | 0.318 | 24.42–0.037*yr | 11.29 | 0.6 | |