. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Soc Sci Res. 2013 Sep 11;0:10.1016/j.ssresearch.2013.08.005. doi: 10.1016/j.ssresearch.2013.08.005

Table 2.

Odds Ratios and 95% Confidence Intervals for Multilevel Logistic Regression Models of Current Smoking: Ascriptive Variables

	Additive Model				Interaction Models
	(1) Females		(2) Males		(3) Females		(4) Males
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Fixed Effects
Constant	0.01 ^***	0.01,0.02	0.01 ^***	0.01,0.02	0.06 ^***	0.02,0.14	0.04 ^***	0.02,0.1
Age/10	10.97 ^***	7.19,16.43	24.99 ^***	15.77,37.13	2.20	0.90,5.33	6.02 ^***	2.36,16.03
Age/10 Squared	0.26 ^***	0.21,0.32	0.27 ^***	0.23,0.34	0.56 ^**	0.37,0.84	0.54 ^**	0.35,0.82
Race (Other)
Black	0.08 ^***	0.06,0.10	0.22 ^***	0.19,0.28	0.08 ^***	0.06,0.10	0.22 ^***	0.18,0.28
Hispanic	0.21 ^***	0.16,0.27	0.40 ^***	0.33,0.51	0.21 ^***	0.17,0.27	0.40 ^***	0.33,0.51
Asian	0.20 ^***	0.14,0.28	0.33 ^***	0.25,0.45	0.20 ^***	0.14,0.28	0.33 ^***	0.25,0.45
Native American	0.78	0.29,1.70	1.83	0.84,3.69	0.77	0.29,1.68	1.83	0.83,3.68
Other	0.41	0.10,1.64	1.20	0.09,2.79	0.41	0.10,1.61	1.21	0.09,2.79
Parent ever smoked	3.42 ^***	2.82,4.02	2.24 ^***	1.87,2.57	3.41 ^***	2.82,4.01	2.24 ^***	1.86,2.57
Parent Education (< high school)
High school degree	1.33 ^*	1.02,1.68	1.11	0.89,1.44	0.27 ^*	0.08,0.90	0.13 ^**	0.05,0.58
Some college	0.83	0.64,1.00	0.99	0.81,1.23	0.13 ^***	0.05,0.38	0.16 ^**	0.06,0.51
College degree	0.65 ^**	0.49,0.83	0.64 ^***	0.50,0.82	0.05 ^***	0.01,0.15	0.25 ^*	0.07,0.92
Interactions
Parent ed HS degree ^* age					5.87 ^**	1.64,19.64	9.48 ^***	2.08,29.05
Parent ed HS degree ^* age²					0.49 ^*	0.28,0.89	0.37 ^**	0.22,0.73
Parent ed some college^* age					6.86 ^***	2.23,20.16	6.71 ^***	2.06,20.43
Parent ed some college ^* age²					0.41 ^***	0.25,0.69	0.42 ^***	0.25,0.71
Parent ed college degree^* age					13.32 ^***	3.91,51.69	2.36	0.62,9.04
Parent ed college degree^* age²					0.23 ^***	0.12,0.4	0.56	0.3,1.04
Random Effects	Estimate	SE	Estimate	SE	Estimate	SE	Estimate	SE
Variance of age	4.856	0.445	4.744	0.495	5.100	0.460	4.961	0.512
Variance of age²	0.365	0.078	0.619	0.089	0.360	0.079	0.633	0.091
Variance of constant	5.578	0.378	3.966	0.339	5.465	0.379	3.880	0.342

^***

p < .001;

^**

p < .01;

p <.05

Source: National Longitudinal Study of Adolescent Health (Female N person = 8901; Female N person-time = 29982 Male N person = 8396 Male N person-time = 27298

Notes: Age squared, racial categories, and parent smoking status are centered to their sample means. Age is centered at the minimum, such that 11 year old respondents are set to 0.