Multilevel Models in SSDP and TIP: Predictors of Marijuana Use

Predictor	Full adult sample (N = 808)	Actively parenting subsample (N = 383)	Nonparent subsample (N = 135)
TIME-FIXED (Level 2)	OR (95% CI)
Intercept	0.04 (0.02, 0.06)***	0.03 (0.01, 0.10)***	0.02 (0.01, 0.12)***
Parent male	1.21 (0.86, 1.69)	0.67 (0.27, 1.66)	0.74 (0.32, 1.72)
Parent Black	1.06 (0.72, 1.56)	1.70 (0.72, 4.01)	0.25 (0.09, 0.71)*
Parent Asian	0.64 (0.40, 1.03)+	2.25 (0.83, 6.11)+	0.70 (0.25, 2.00)
Parent Native	0.88 (0.44, 1.77)	1.21 (0.33, 4.48)	0.58 (0.03, 13.24)
Parent education	0.85 (0.73, 0.99)*	0.76 (0.56, 1.02)+	0.87 (0.59, 1.29)
Young adult mj. use (21–24)	6.98 (4.97, 9.81)***	19.84 (9.63, 40.89)***	9.85 (4.10, 23.70)***
Time intercept	2.18 (0.68, 7.06)	1.16 (0.86, 1.56)	0.75 (0.03, 19.81)
Parent male	0.57 (0.28, 1.17)	0.90 (0.76, 1.08)	4.22 (0.83, 21.54)+
Parent Black	0.69 (0.31, 1.55)	1.06 (0.91, 1.24)	4.38 (0.54, 35.34)
Parent Asian	0.89 (0.33, 2.41)	1.26 (1.01, 1.58)*	2.20 (0.28, 17.38)
Parent Native	0.67 (0.15, 2.90)	1.07(0.85, 1.35)	†
Parent education	0.73 (0.53, 1.00)*	0.98 (0.92, 1.04)	0.71 (0.34, 1.51)
Young adult mj. use (21–24)	0.53 (0.26, 1.09)+	0.92 (0.81, 1.04)	0.09 (0.02, 0.49)**
Time intercept2	3.78 (1.23, 11.63)*	1.03 (1.00, 1.07)+	4.03 (0.27, 60.47)
TIME-VARYING (Level 1)
Partner marijuana use	7.20 (4.42, 11.73)***	2.86 (1.09, 7.52)*	51.64 (7.91, 337.06)***
Single	1.77 (1.30, 2.42)***	1.94 (0.87, 4.30)	3.99 (1.74, 9.17)**
Pro-marijuana attitudes	8.36 (6.01, 11.63)***	9.47 (5.13, 17.49)***	10.78 (4.74, 24.52)***
Primary caregiver	-	0.47 (0.21, 1.06)+	--
Partner mj. use × time	0.77 (0.23, 2.55)	0.95 (0.76, 1.19)	0.02 (0.00, 1.09)+
Single × time	1.11 (0.52, 2.41)	1.16 (0.96, 1.39)	2.16 (0.29, 16.18)
Pro-mj. attitudes × time	1.78 (0.77, 4.09)	1.01 (0.89, 1.15)	0.97(0.13, 7.39)
Primary caregiver × time	-	0.94 (0.78, 1.12)	--

Note.

⁺p < .10,

^*p < .05,

^**p < .01,

^***p < .001;

mj. = marijuana.

^†uninterpretable due to a low number of Native Americans

Reference group for ethnicity is White.