Table 6.

Variations explained by various factors

		Variation explained by five factors	Variation explained by age-related factors	Genetic variation
FA	Genu	0.59	0.57	0.25
	Splenium	0.35	0.33	0.52
	Cingulum	0.31	0.22	0.15
AD	Genu	0.41	0.40	0.46
	Splenium	0.39	0.36	0.34
	Cingulum	0.37	0.34	0.36
RD	Genu	0.56	0.55	0.30
	Splenium	0.53	0.50	0.38
	Cingulum	0.58	0.57	0.31

Five factors are gender, scanner type, gradient direction, gestational and postmenstrual age (two age-related factors)