Table 1.

Reasons for not using or for stopping marijuana use among high school seniors reporting probably/definitely will not use marijuana in the next 12 months, 1977-2005: Overall percentage reporting and correlations with past 12-month marijuana use over 29 years

Question stem: “Here are some reasons people give for notusing marijuana, or for stopping use. Please tell us whichreasons are true for you. (Mark ALL that apply.)”	%	Pearson r	pa
Concerned about possible physical damage	63.8	−.40	*
Concerned about possible psychological damage	63.0	−.26
Don't feel like getting high	61.8	−.74	‡
My parents would disapprove	58.5	−.00
It might lead to stronger drugs	51.6	−.77	‡
It's against my beliefs	50.9	−.15
Concerned about possible loss of control of myself	49.6	−.87	‡
Concerned about becoming addicted to marijuana	49.1	−.92	‡
Concerned about getting arrested	45.1	−.21
I don't like being with the people who use it	42.6	−.75	‡
Concerned about loss of energy or ambition	36.4	−.57	‡
My friends don't use it	35.3	−.85	‡
My husband/wife (or boyfriend/girlfriend) would disapprove	32.8	−.81	‡
Not enjoyable, I didn't like it	29.1	−.65	‡
Too expensive	24.3	−.36
I might have a bad trip	23.5	−.84	‡
Not available	6.6	−.69	‡

Notes: n for percentage student reporting = 51,769; n for correlations with annual aggregate measures of past 12-month marijuana use obtained using year-level aggregations of the data = 29. ^aProbability that r is not 0.0.

^* p < .05;

^† p < .01;

^‡ p < .001.