Table 4.

Multiple logistic regression predicting girls’ grade average in the last trimester, after adjusting for mother and father’s education and comparison socioeconomic status (n = 970)

Combined drug use	B (SE)	AOR	95%CI for AOR	P value
Used alcohol, hashish, or psychotropic drugs in the past 30 d	0.96 (0.35)	2.62	1.31, 5.22	0.006
Used alcohol, hashish, or psychotropic drugs in the past 12 mo	0.27 (0.38)	1.3	0.63, 2.72	0.479
Ever used alcohol, hashish, psychotropic, or other drugs	0.54 (0.24)	1.72	1.07, 2.77	0.026
Never used	-	-	-	-

AOR: Adjusted odds ratio.