Table 2.

Self-reported Substance Use (Mean ± SE)^a

	Control		Methamphetamine use disorder
	Smoking N = 6	Non-smoking N = 8	Smoking N = 8	Non-smoking N = 6
Methamphetamine use
Duration (y)			6.52 ± 2.45	8.28 ± 3.13
Average daily use (g/d)			2.6 ± 1.7	1.3 ± 0.4
Days used in last 30 d			21.6 ± 4.6	9.7 ± 3.2
Duration of abstinence (d)			38.9 ± 6.0	45.2 ± 5.8
Route of administration
Smoking, n (%)			7 (87.5)	5 (83.3)
Intravenous injection, n (%)			0 (0)	2 (33.3)
Sniff/snort, n (%)			3 (37.5)	5 (83.3)
Tobacco use
Days used in last 30 d	17.5 ± 4.3		26.3 ± 2.1
Cigarettes per day	7.3 ± 2.9		7.1 ± 2.0
Duration of abstinence (h)	1063.6 ± 40.7		18.8 ± 1.0
Nicotine withdrawal (Shiffman- Jarvik average score)	3.3 ± 0.7		3.2 ± 0.5
Fagerström (FTND) score	2.8 ± 1.4		2.4 ± 0.8
Cannabis use
Number of participants, n (%)	2 (33.3)	1 (12.5)	3 (37.5)	2 (33.3)
Days used in last 30 d	12 ± 8	5	13.0 ± 8.6	1.5 ± 0.5
Alcohol use
Number of participants, n (%)	6 (100)	4 (50)	3 (37.5)	2 (33.3)
Days used in last 30 d	7.7 ± 2.2	4.2 ± 2.1	10.3 ± 6.6	9.5 ± 5.5

Abbreviations: FTND, Fagerström test for nicotine dependence.

^a No significant differences in tobacco, cannabis, or alcohol use.