Table 3.

Mean ancestry fraction in ependymoma cases, ages 0–19, and age-matched controls

Self-Reported Race/Ethnicity	Cases/Controls	Genetically Estimated Ancestry Fractions	Cases Mean (SD)	Control Mean (SD)	P-valuea
Hispanic	142/1147	% Native American	41.7 (15.2)	45.0 (16.7)	0.025
		% African	4.6 (2.5)	5.3 (5.1)	0.11
		% European	53.6 (15.6)	49.6 (16.7)	6.2 × 10−3
African American	32/116	% Native American	6.7 (9.5)	4.7 (7.7)	0.22
		% African	67.1 (17.6)	70.8 (17.7)	0.30
		% European	26.2 (14.5)	24.5 (15.8)	0.59

^aTwo-tailed t-test.