Table 1 Characteristics of the individuals included in the discovery and replication stages.

From: Identification of a novel locus associated with skin colour in African-admixed populations

Characteristics

Discovery sample

Replication sample

p-value

Hispanics/Latinos (n = 285)

African Americans (n = 373)

Gender (% male)

47

45

0.515a

Mean age (years) (P25–P75)

15 (13–17)

15 (12–18)

0.590b

Mean melanin index ± SD

45.8 ± 6.8

71.9 ± 13.5

<0.001b

Mean genetic ancestry (%)

European

66.8

19.1

<0.001b

African

22.8

80.9

<0.001b

Native-American

10.4

NA

NA

  1. aPearson χ2 test (df = 1; α = 0.05); bMann-Whitney U test; P25: Percentile 25; P75: Percentile 75; SD: Standard deviation. NA: Not applicable.