Table 1.

Demographic and clinical characteristics of the sample. The mean, standard deviation (SD), t-value, and p-value are shown.

VARIABLE	NC (N =50)			OA (N =50)			t-value	p-value
	Mean	S.D.	Range	Mean	S.D.	Range
Age (in years)	20.34	1.93	18–24	20.72	2.06	18–25	−0.951	0.344
Education (in years)	13.36	2.04	9–17	12.42	1.33	0–16	2.734	0.007**
No. of drinking days per month	1.79	2.83	0–12	4.14	6.05	0–20	−1.791	0.079
No. of drinks† per drinking day	1.36	1.75	0–6	1.65	1.69	0–6	−0.605	0.548
No. of cigarettes per smoking day	0.80	1.89	0–10	3.29	5.37	0–20	−3.059	0.003**

^**p < 0.01

^†One drink = 1 shot glass of hard liquor; 1 glass of wine; 1 bottle of beer.