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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: J Am Acad Dermatol. 2010 Jun 3;63(3):440–447. doi: 10.1016/j.jaad.2009.09.042

Table II. Summary data in different groups based on age, gender, race, and sun exposure. All values are melanin units (M).

Group Mean Standard deviation
Age 4-9 5.037 2.879
11-16 5.5 3.038
36 11.034 2.156
Sex Male 5.407 2.812
Female 5.365 3.375
Race Caucasian 4.967 2.561
African American 8.154 4.492
Sun exposure status Low 5.398 2.975
Medium 5.523 3.187
High 4.863 2.854