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. 2011 Nov 2;6(11):e27162. doi: 10.1371/journal.pone.0027162

Table 7. Genetic ancestry and Skin Pigmentation×SES (ANOVA with Bonferroni correction).

A (n = 4) B (n = 76) C (n = 76) D ( = 16) p
European Ancestry 0.70±0.02 0.71±0.08* 0.67±0.07 0.65±0.07 0.002
African Ancestry 0.21±0.03 0.19±0.07++ 0.22±0.07 0.24±0.07 0.021
Amerindian Ancestry 0.09±0.03 0.10±0.03 0.11±0.03 0.11±0.03 0.068
Pigmentation 35.64±4.98 36.13±3.38 36.74±3.44 37.33±3.63 0.498

SES = socioeconomic status; Data presented as mean ± standard deviation.

*Different from C and D;

++Different from D.