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. Author manuscript; available in PMC: 2013 Sep 6.
Published in final edited form as: Neurosci Lett. 2012 Jul 20;525(1):17–22. doi: 10.1016/j.neulet.2012.07.016

Table 1.

Demographics of sample.

Scanned N = 35* Genotyped N = 36* Scanned and Genotyped N = 31*
Mother
Age at scan (mean years, SD) 47.31 (5.18) 47.42 (5.03) 47.39 (5.27)
Number of live births (mean, SD) 2.34 (0.72) 2.36 (0.68) 2.39 (0.72)
Child
Age in wave 1 (mean years, SD) 5.23 (0.77) 5.25 (0.77) 5.19 (0.79)
% Male 85.7 86.1 87.1
% African American 45.7 41.7 41.9
Prematurity (mean weeks, SD) 0.46 (1.01) 0.44 (1.00) 0.52 (1.06)
% Caesarian 25.7 22.2 25.8
% ADHD in wave 1 48.6 50.0 48.4
% First born 57.1 52.8 51.6
*

One missing parenting data.