Table 3. Alopecia Areata and Hair Color: Unmatched Multivariable Analysis.

Variable	aOR (95% CI)	P value
Age at AA diagnosis, y	0.98 (0.98-0.99)	<.001
Sex
Male	0.63 (0.57-0.70)	<.001
Female	1 [Reference]	NA
Diabetes
Yes	0.97 (0.76-1.21)	.79
No	1 [Reference]	NA
Hypothyroidism
Yes	1.71 (1.46-1.99)	<.001
No	1 [Reference]	NA
Hyperthyroidism
Yes	0.70 (0.45-1.06)	.11
No	1 [Reference]	NA
Vitiligo
Yes	3.57 (2.29-5.28)	<.001
No	1 [Reference]	NA
Hair color
Blond	0.75 (0.62-0.90)	.003
Red	0.88 (0.67-1.13)	.34
Light brown	1 [Reference]	NA
Dark brown	1.27 (1.14-1.42)	<.001
Black	2.87 (2.39-3.42)	<.0001

Abbreviations: AA, alopecia areata; aOR, adjusted odds ratio; NA, not applicable.