Table 1.

Demographic characteristics of study participants

Demographic characteristics	History of PHG	No history of PHG
Total number of participants	216	251
Age range
30 and under	116	103
31-50	61	65
51-80	39	83
Race
Caucasian	140	166
Asian	36	39
African American	18	28
Multiracial/other	22	18
Sex
Female	162	192
Male	54	59

PHG – Premature hair graying