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Table 4 Sex-dependence of calcium concentration in human hair (μg/g hair)

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

Age (years)FemaleMaleF/M ratiop-value
NumberAverageS.D.NumberAverageS.D.
0–32833653191350.890.6757
5–144269722383981.110.2063
10–15551181174271191.290.0276
15–775818596171921.230.0161
20–1989228975802091.540.0156
30–23894246105731581.560.0007
40–36931239166071501.53<0.0001
50–17781254105221601.500.0078
60–1010662397674741.580.0008
70–101032428166182421.670.0042
80–15110124786492531.700.0005
  1. S.D. indicates standard deviation
  2. F/M ratio is the ratio of the female average calcium concentration to the male average calcium concentration