TABLE 1.
Participants' characteristics by hair color and MC1R* gene variant status (N = 144).
| CHARACTERISTIC | DARK HAIR (n = 77) |
RED HAIR (n = 67) |
P VALUE | NO VARIANTS (n = 59) |
MC1R GENE VARIANTS (n = 85) |
P VALUE |
|---|---|---|---|---|---|---|
| MC1R Gene Variant Status | < .001 | —† | ||||
| None | 57 | 2 | — | — | ||
| 1 or 2 | 20 | 65 | — | — | ||
| Sex (No. [%]) | .29 | .23 | ||||
| Male | 39 (51) | 28 (42) | 31 (52) | 36 (42) | ||
| Female | 38 (49) | 39 (51) | 28 (47) | 49 (58) | ||
| Mean Age (Year [Range]) | 26.6 (18-41) | 28.3 (19-40) | .06 | 26.8 (18-40) | 27.8 (19-40) | .28 |
| Education (No. [%]) | .15 | .27 | ||||
| High school or less | 9 (12) | 7 (10) | 6 (10) | 10 (12) | ||
| Vocational/Associate | 6 (8) | 4 (6) | 4 (7) | 6 (7) | ||
| Some university | 36 (47) | 23 (34) | 26 (45) | 33 (39) | ||
| Completed university | 10 (13) | 21 (31) | 8 (14) | 23 (27) | ||
| Postgraduate | 15 (19) | 12 (18) | 14 (24) | 13 (15) | ||
| Unknown | 1 (1) | 0 (0) | 1 (2) | 0 (0) | ||
| Marital Status (No. [%]) | .03 | .01 | ||||
| Currently married | 14 (18) | 15 (22) | 12 (20) | 17 (20) | ||
| Previously married | 3 (4) | 13 (19) | 0 (0) | 16 (19) | ||
| Never married | 60 (78) | 39 (58) | 47 (80) | 52 (61) | ||
| Last Dental Visit (No. [%]) | .39 | .37 | ||||
| Within past year | 36 (47) | 28 (42) | 31 (53) | 33 (39) | ||
| 1-2 years ago | 30 (39) | 22 (33) | 20 (34) | 32 (38) | ||
| 3 or more years ago | 11 (14) | 17 (25) | 8 (14) | 20 (24) | ||
*
MC1R: Melanocortin-1 receptor.
†
—: Not applicable, variant by variant.