. Author manuscript; available in PMC: 2013 Jun 1.

Published in final edited form as: J Res Pers. 2012 Jun 1;46(3):295–305. doi: 10.1016/j.jrp.2012.02.009

Table 4.

Zero-inflated Poisson models predicting probability of increased average alcohol use (N = 4,476).

	Model 1	Model 2	Model 3	Model 4

	Incident Count IRR (CI)	Incident Count IRR (CI)	Incident Count IRR (CI)	Incident Count IRR (CI)
Age	0.79 (0.76–0.82)^***	0.80 (0.77–0.83)^***	0.81 (0.78–0.85)^***	0.81 (0.77–0.84)^***
Male	1.54 (1.44–1.65)^***	1.52 (1.42–1.64)^***	1.49 (1.38–1.62)^***	1.50 (1.38–1.62)^***
Non-White	0.87 (0.76–1.01)	0.88 (0.77–1.02)	0.83 (0.69–1.02)	0.82 (0.69–0.98)^*
Non-Married	1.12 (1.05–1.21)^***	1.11 (1.03–1.20)^**	1.11 (1.02–1.20)^**	1.11 (1.02–1.20)^**
Education	0.89 (0.85–0.92)^***	0.89 (0.86–0.92)^***	0.88 (0.84–0.92)^***	0.88 (0.84–0.92)^***
Prior Drinking	1.05 (1.04–1.06)^***	1.05 (1.04–1.06)^***	1.05 (1.04–1.06)^***	1.05 (1.04–1.06)^***
Conscientiousness		0.94 (0.91–0.98)^***	0.94 (0.90–0.98)^**	0.94 (0.90–0.98)^**
Neuroticism		1.04 (1.01–1.08)^*	1.07 (1.01–1.12)^**	1.06 (1.02–1.11)^**
Extraversion		1.08 (1.04–1.13)^***	1.09 (1.04–1.15)^***	1.09 (1.04–1.15)^***
Agreeableness		0.98 (0.95–1.02)	0.93 (0.88–0.97)^***	0.93 (0.89–0.97)^***
Openness		1.02 (0.97–1.06)	1.04 (0.99–1.10)	1.03 (0.98–1.09)
Con Δ			0.94 (0.84–1.04)	0.93 (0.84–1.03)
Neuro Δ			1.10 (1.02–1.19)^**	1.11 (1.03–1.20)^**
Extra Δ			1.07 (0.97–1.20)	1.09 (0.98–1.21)
Agree Δ			0.80 (0.72–0.89)^***	0.81 (0.73–0.89)^***
Open Δ			1.14 (1.02–1.28)^*	1.17 (1.05–1.31)^**
Neur X Con				0.95 (0.92–0.99)^**
Extra X Con				1.00 (0.96–1.04)
Agree X Con				0.97 (0.93–1.01)
Open X Con				1.02 (0.97–1.06)
Model Fit AIC	12552.70	11859.26	10161.05	10159.17

Note: IRR = Incident Rate Ratio. CI = 95% Confidence Interval. Δ = Change. AIC = Akaike Information Criterion.

p < .05.

^**

p < .01

^***

p < .001.