. Author manuscript; available in PMC: 2009 Sep 11.

Published in final edited form as: J Abnorm Psychol. 2009 May;118(2):241–255. doi: 10.1037/a0015126

Table 1.

Mediation of Precollege Drinking in the Effects of Personality on Greek Affiliation

Predictor	Mediator at precollege	Indirect effect	95% CI of indirect effect	Direct effect	Total effect	Proportion mediated
Impulsivity/novelty seeking	5 + drinks	.10^***	.08, .13	−.14^***	.24^a	42%
	12 + drinks	.04^***	.02, .05	−.07^*	.12^a	33%
Extraversion	5 + drinks	.03^**	.01, .04	.40^***	.43	7%
	12 + drinks	.003	−.01, .01	.41^***	.42	1%
Neuroticism	5 + drinks	−.03^**	−.04, −.01	.10^**	.13^a	23%
	12 + drinks	−.01	−.01, .001	.08^**	.09^a	11%

Note. N = 3,099. All estimates are unstandardized. Confidence intervals (CIs) resulted from 500 bootstrap draws.

Due to a suppression effect, a total effect was calculated by summing absolute values of direct and indirect effects.

p < .05.

^**

p < .01.

^***

p < .001.