Table 3.

Mean cumulative grade point average by behavioral risk factors among University students

Variables (N=2173)		Mean CGPA (SD)	t-test	P-value
Alcohol use	No	2.88(0.50)	2.775	0.006*
	Yes	2.79(0.50)
Cigarette smoking	No	2.87(0.50)	2.7 11	0.008*
	Yes	2.74(0.40)
Khat use	None	2.87(0.50)	0.6 09	0.5 43
	< 1 per week	2.84(0.44)
	1-2 per week	2.84(0.50)
	≥ 3 per week	2.86(0.42)
Coffee use	No	2.86(0.50)	−1.137	0.2 56
	Yes	2.88(0.50)

^*P-value ≤0.05

^**<0.01