Table 9.
Pairwise Comparisons, Hair Color Categories by Mean VPA Concentration
| Hair Color | Hair Color | Mean | Std. | Sig.a |
| (I) | (J) | Difference | Error | |
| (I-J) | ||||
| Black | Brown | 1.811 | .758 | .135 |
| Blond | 3.584 | 1.368 | .078 | |
| Gray | 6.457 | 2.344 | .056 | |
| Brown | Black | -1.811 | .759 | .135 |
| Blond | 1.772 | 1.345 | 1.000 | |
| Gray | 4.646 | 2.209 | .258 | |
| Blond | Black | -3.584 | 1.368 | .078 |
| Brown | -1.772 | 1.345 | 1.000 | |
| Gray | 2.873 | 2.422 | 1.000 | |
| Gray | Black | -6.457 | 2.344 | .056 |
| Brown | -4.646 | 2.209 | .258 | |
| Blond | -2.873 | 2.422 | 1.000 |
a Bonferroni adjustment for multiple comparisons