. Author manuscript; available in PMC: 2018 Jun 1.

Published in final edited form as: Assessment. 2016 Sep 1;25(4):403–414. doi: 10.1177/1073191116667584

Table 5.

Multivariate Demographic Factors Predicting Weekly Timeline Followback Class Membership.

	Intercept	Slope	Quadratic	Reference high		Reference decline		Reference low
	Intercept	Slope	Quadratic	Low	Decline	Low	High	Decline	High
Age (years)	−0.02 (0.05)	−0.01 (0.04)	0.00 (0.01)	−0.07 (0.08)	−0.03 (0.07)	−0.03 (0.08)	0.03 (0.07)	0.03 (0.08)	0.07 (0.08)
Relationship	−0.26 (0.48)	−0.37 (0.32)	0.02 (0.05)	0.10 (0.72)	−0.36 (0.67)	0.46 (0.97)	0.36 (0.67)	−0.46 (0.97)	−0.10 (0.72)
Feedback	−0.69 (0.44)	0.32 (0.29)	−0.06 (0.04)	−0.39 (0.64)	0.52 (0.55)	−0.91 (0.67)	−0.52 (0.55)	0.91 (0.67)	0.39 (0.64)
Black	0.39 (0.55)	0.33 (0.36)	−0.04 (0.05)	2.22 (1.30)	3.28 (1.29)^*	−1.07 (0.75)	−3.28 (1.29)^*	1.07 (0.75)	−2.22 (1.30)
Hispanic	−0.73 (0.64)	0.17 (0.39)	−0.03 (0.06)	0.22 (0.78)	0.19 (0.75)	0.03 (1.16)	−0.19 (0.75)	−0.03 (1.16)	−0.22 (0.78)
Other	−1.09 (0.53)^*	−0.57 (0.44)	0.06 (0.07)	−17.08 (0.74)^***^†	0.77 (0.74)	−17.85 (0.00)^***^†	−0.77 (0.74)	17.85 (0.00)^***^†	17.08 (0.74)^***^†

^†

Significant at Bonferonni-adjusted p value (p < .003).

p < .05.

^**

p < .01.

^***

p < .001.