Table 3.

Negative Binomial Regression Predicting Alcohol Use

Variable	b	Robust SE	z	p	95% CI	IRR	95% CI
Social Motives	0.84	0.21	4.04	.000	0.43 – 1.24	2.31	1.54 – 3.46
Enhancement Motives	−0.17	0.25	−0.66	.510	−0.66 – 0.33	0.85	0.52 – 1.39
Coping Motives	−0.03	0.18	−0.14	.885	−0.39 – 0.27	0.97	0.68 – 1.40
Lack of Premeditation	−0.22	0.25	−0.88	.380	−0.72 – 0.27	0.80	0.49 – 1.32
Sensation Seeking	0.41	0.17	2.34	.019	0.07 – 0.75	1.50	1.07 – 2.11
Negative Urgency	0.37	0.24	1.55	.121	−0.10 – 0.83	1.44	0.91 – 2.30
Depression	0.93	0.44	2.11	.035	0.07 – 1.79	2.54	1.07 – 6.01
Reexperiencing	−0.10	0.14	−0.70	.485	−0.37 – 0.18	0.91	0.69 – 1.19
Avoidance	0.58	0.24	2.43	.015	0.11 – 1.04	1.78	1.12 – 2.83
Arousal	−0.20	0.17	−1.21	.227	−0.53 – 0.13	0.82	0.59 – 1.14
Gender	0.16	0.33	0.49	.625	−0.48 – 0.80	1.17	0.62 – 2.23
Age	0.19	0.09	2.15	.032	0.02 – 0.36	1.21	1.02 – 1.44
Cannabis Use	−0.02	0.01	−4.15	.000	−0.03 – −0.01	0.98	0.97 – 0.99

Note. X²(13; N = 133) = 111.13, p < .001. b = unstandardized coefficients. IRR = Incident Rate Ratio.