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) | Female | Male | F/M ratio | p-value | ||||
|---|---|---|---|---|---|---|---|---|
Number | Average | S.D. | Number | Average | S.D. | |||
0– | 3 | 283 | 36 | 5 | 319 | 135 | 0.89 | 0.6757 |
5– | 14 | 426 | 97 | 22 | 383 | 98 | 1.11 | 0.2063 |
10– | 15 | 551 | 181 | 17 | 427 | 119 | 1.29 | 0.0276 |
15– | 7 | 758 | 185 | 9 | 617 | 192 | 1.23 | 0.0161 |
20– | 19 | 892 | 289 | 7 | 580 | 209 | 1.54 | 0.0156 |
30– | 23 | 894 | 246 | 10 | 573 | 158 | 1.56 | 0.0007 |
40– | 36 | 931 | 239 | 16 | 607 | 150 | 1.53 | <0.0001 |
50– | 17 | 781 | 254 | 10 | 522 | 160 | 1.50 | 0.0078 |
60– | 10 | 1066 | 239 | 7 | 674 | 74 | 1.58 | 0.0008 |
70– | 10 | 1032 | 428 | 16 | 618 | 242 | 1.67 | 0.0042 |
80– | 15 | 1101 | 247 | 8 | 649 | 253 | 1.70 | 0.0005 |