Table 2.

Comparison of individuals with a DSM-IV diagnosis who would not meet DSM-5 criteria, and vice versa, with stably affected individuals.

Characteristic	%			Z statistic¹
	D4-only (N=174)	D5-only (N=291)	D4D5 (N=2107)	D4-only vs. D4D5	D5-only vs. D4D5	D4-only vs. D5-only
Male	74.1	63.6	75.7	-0.33	-4.07^**	2.48^*
Mean age on onset of symptoms	21.0 (SE=.39)	22.0 (SE=.31)	21.0 (SE=.12)	0.04	3.24^**	-1.96^*
Maximum drinks in 24 hours	13.3 (SE=.73)	11.8 (SE=.42)	16.7 (SE=.26)	-4.40^**	-10.08^**	0.52
Major depression	32.2	35.4	43.9	-2.95^**	-2.71^**	-0.91
Generalized anxiety disorder	19.5	22.7	31.4	-3.20^**	-3.00^**	-0.69
Conduct disorder	16.5	14.5	28.5	-3.22^**	-4.64^**	0.65
Antisocial personality disorder/adult antisocial behavior	10.1	8.6	26.0	-4.23^**	-5.87^**	1.00
Mean Fagerstrom Test for Nicotine Dependence Score²	4.3	4.2	4.9	-2.39^*	-3.07^**	0.35
Cocaine diagnosis³	4.6	2.4	14.1	-3.32^**	-5.02^**	1.25
Cannabis diagnosis	21.3	12.0	34.3	-3.34^**	-7.16^**	2.51^*
Sedative diagnosis	2.9	2.1	7.8	-2.25^**	-3.32^**	0.61
Stimulant diagnosis	8.0	5.2	15.2	-2.32^*	-4.25^**	1.25
Opiate diagnosis	1.7	1.0	4.5	-1.65	-2.54^*	0.63

Coded such that a negative Z statistic indicates a lower prevalence in the first group listed

Only applies to current or past regular smokers

Drug-related diagnoses refer to abuse or dependence

p<0.05

^**

p<0.01