Table 1.

Demographic Information.

	Discovery (N = 1,166)	Replication (N = 1,022)
Age (months)	M = 120.49, SD = 7.35	M = 120.5, SD = 7.59
Sex	635 Female | 531 Male	509 Female | 513 Male
Sibling Status: N(%) (unrelated/sibling/twin/triplet)	773/150/240/1 (66.3/12.9/20.8/0.1%)	652/146/220/4 (63.8%/14.3%/21.5%/0.4%)
Framewise Displacement (mm; across all uncensored frames)	M = 0.11, SD = 0.04, range = (0.03-0.199)	M = 0.11, SD = 0.04, range = (0.03-0.199)
Average Frames Included	M = 1,294, SD = 187	M = 1,309, SD = 180
NIH Toolbox Total	M = 88.52, SD = 8.23 (N = 1142)	M = 88.64, SD = 8.53 (N = 998)