Table S1.

Statistical comparisons for alcoholism and smoking

Measure	Contrast	df	t	P-value	d
Duration of heavy drinking (years)	sNA < sAL	6	5.55	0.001	3.35
Duration of heavy drinking (years)	nsNA < nsAL	6	5.33	0.002	3.08
Duration of heavy drinking (years)	sNA < nsAL	6	5.33	0.002	3.21
Duration of heavy drinking (years)	nsNA < sAL	6	5.55	0.001	3.20
Average drinks per day	sNA < sAL	6.08	5.00	0.002	3.02
Average drinks per day	nsNA < nsAL	6.02	4.35	0.005	2.51
Average drinks per day	sNA < nsAL	6.03	4.33	0.005	2.61
Average drinks per day	nsNA < sAL	6.08	5.00	0.002	2.89
Cigarettes per day	nsAL < sAL	6	7.97	0.0002	4.60
Cigarettes per day	nsNA < sNA	5	2.67	0.04	1.61
Cigarettes per day	sNA < sAL	10.06	2.91	0.02	1.75
Cigarettes per day	nsAL < sNA	5	2.67	0.04	1.61
Cigarettes per day	nsNA < sAL	6	7.99	0.0002	4.61

Notes: For each contrast, degrees of freedom (df), t, P, and Cohen’s d values are presented. Cohen’s d was calculated with the following formula: 2t/√ (N − 2). In purple: comorbid effects (sAL versus nsNA). In red: smoking effects (sAL versus nsAL or sNA versus nsNA). In blue: alcholism effects (sAL versus sNA or nsAL versus nsNA). In green: cross effects of smoking and alcoholism (sNA versus nsAL).

Abbreviations: nsAL, alcoholic participants – currently not smoking; nsNA, nonalcoholic participants – currently not smoking; sAL, alcoholic participants (the comorbid group); sNA, nonalcoholic participants – current smokers.