Table 3.

Demographic comparisons by 5-HTTLPR genotype and for full sample

Variable	Long	Short	Overall
Age (SD)	11.29(.51)	11.25(.49)	11.26(.50)
% Female	54.5	54.4	54.4
% Intervention	60.3	59.2	59.5
% European	87.2	80.8	82.8
Ethnicity
White	94.2%	88.5%	90.2
Hispanic/Latino	2.6%	5.9%	4.9
African American	1.3%	2.3%	2.0
Asian	.6%	.6%	.6
Other (Non-White)	1.3%	2.8%	2.3

Note: % European is based on PC1, Ethnicity is based on participant self-report. PC1 is reported here in standard deviation units.