Table 3.

Predictors of delay discounting behavior across the HCP 1200 database

	Area under the curve ($200)				Area under the curve ($40000)
Variable	B	SE B	β	% Var	B	SE B	β	% Var
Constant	.263***	.009			.507***	.012
Income	.003	.003	.036	0.10	.010*	.004	.073	0.41
Education	.013***	.004	.119	1.08	.022***	.005	.142	1.54
Fluid intelligence CR	.005***	.001	.108	0.98	.006***	.002	.109	0.98
Age	−.001	.002	−.011	0.01	−.002	.002	−.025	0.05
Sex	−.009	.012	−.023	0.05	−.004	.016	−.008	0.00
Sleep duration	.027***	.005	.151	2.16	.040***	.007	.161	2.43
Daytime dysfunction	.009	.006	.043	0.18	.012	.008	.042	0.17
R 2				0.073				0.095
F				13.33***				17.77***

N = 1190. Sex: male = 0, female = 1. CR = correct responses. B = unstandardized. % Var = percent of unique variance (squared semi partial correlations). Predictors are centered about their means. Predictors satisfying Bonferroni-corrected p < 0.007 are bolded.

*p < 0.05, ***p < 0.001.