. Author manuscript; available in PMC: 2009 Aug 10.

Published in final edited form as: Addict Behav. 2006 Nov 13;32(7):1384–1394. doi: 10.1016/j.addbeh.2006.09.010

Table 3.

Summary of stepwise regression results for marijuana use as a function of motives, sex, and ethnicity.

Step	Predictor	Partial R²	Model R²	F partial
Step 1	Experimentation	0.115	0.115	61.64^***
Step 2	Habit	0.044	0.159	24.75^***
Step 3	Activity enhancement	0.038	0.197	22.07^***
Step 4	Altered perception or perspectives	0.020	0.217	12.20^***
Step 5	Enjoyment/fun	0.019	0.236	11.62^***
Step 6	Sex	0.012	0.247	7.20^**
Step 7	Ethnicity	0.010	0.257	6.18^*
Step 8	Relative low risk	0.006	0.264	3.99^*

Note.

^***

p < .001.

^**

p < .01.

p < .05.