. 2017 May 19;8:86. doi: 10.3389/fpsyt.2017.00086

Table 2.

Substance use and related characteristics of the participants with respect to problematic alcohol use (n = 725).

Variables		Problematic alcohol use		χ²	df	p-Value
Variables		No, n (%)	Yes, n (%)	χ²	df	p-Value
Parents alcohol use history	Yes	131 (18.1)	29 (4.0)	9.03	1	0.003
Parents alcohol use history	No	511 (70.5)	54 (7.4)
Alcohol user intimate friend	Yes	185 (25.5)	53 (7.3)	40.9	1	<0.0001
Alcohol user intimate friend	No	457 (63.0)	30 (4.1)
Lifetime substance use^a	Yes	174 (24.0)	66 (9.1)	91.18	1	<0.0001
Lifetime substance use^a	No	468 (64.6)	17 (2.3)
Interest in their department	Yes	547 (75.4)	70 (9.7)	0.04	1	0.84
Interest in their department	No	95 (13.1)	13 (1.8)
Probable social phobia	No	356 (49.1)	33 (4.6)	7.28	1	0.007
Probable social phobia	Yes	286 (39.4)	50 (6.9)

^aUse of substances (alcohol, khat, and tobacco products) in their lifetime.