Table 5.

Multiple logistic regression predicting boys’ grade average in the last trimester, after adjusting for mother and father’s education and comparison socioeconomic status (n = 831)

Combined drug use	B (SE)	AOR	95%CI for AOR	P value
Used alcohol, hashish, or psychotropic drugs in the past 30 d	0.73 (0.23)	2.08	1.33, 3.24	0.001
Used alcohol, hashish, or psychotropic drugs in the past 12 mo	0.55 (0.29)	1.74	1.00, 3.05	0.052
Ever used alcohol, hashish, psychotropic, or other drugs	0.19 (0.20)	1.21	0.82, 1.79	0.335
Never used	-	-	-	-

AOR: Adjusted odds ratio.