. Author manuscript; available in PMC: 2017 Feb 1.

Published in final edited form as: Addiction. 2015 Oct 26;111(2):233–244. doi: 10.1111/add.13165

Table 5.

Correlation between ACASI and IA ASSIST, based on the intraclass correlation coefficient (ICC), N=393.

Substance Use Variable	ACASI	Interviewer	ICC
Substance Use Variable	Mean score ± SD	Mean score ± SD	ICC
Global ASSIST score	31.6 ± 32.6	31.3 ± 32.7	0.937 (.924–.948)
Tobacco	6.5 ± 9.3	7.0 ± 9.9	0.927 (.912–.940)
Alcohol	6.1 ± 8.3	5.8 ± 8.3	0.912 (.893–.927)
Illicit Drugs	6.9 ± 13.4	6.3 ± 12.8	0.854 (.854–.900)
Cannabis	2.6 ± 5.8	2.5 ± 5.8	0.858 (.829–.882)
Cocaine	2.4 ± 6.2	2.2 ± 6.1	0.861 (.833–.884)
Heroin	1.0 ± 4.3	1.0 ± 4.4	0.924 (.908–.937)
Hallucinogens	0.5 ± 2.4	0.4 ± 2.2	0.748 (.700–.788)
Inhalants	0.2 ± 1.4	0.2 ± 1.5	0.903 (.883–.920)
Methamphetamine	0.1 ± 0.8	0.1 ± 0.9	0.461 (.379–.535)
Rx Drugs	3 ± 9	2 ± 6	0.676 (.613–.729)
Sedatives	0.3 ± 2.3	0.6 ± 3.0	0.728 (.676–.772)
Opioids	0.4 ± 3.0	0.6 ± 3.2	0.939 (.926–.950)
Stimulants	0.1 ± 1.0	0.4 ± 2.4	0.258 (.164–.347)