. Author manuscript; available in PMC: 2010 Jan 1.

Published in final edited form as: Psychol Med. 2008 May 9;39(1):157–167. doi: 10.1017/S0033291708003425

Table 2.

Drugs used among those who had used any illicit drugs prior to alcohol and tobacco, by age. Data from the National Comorbidity Survey Replication (NCS-R), 2001–2003

		Among those who had begun using any illicit drugs before alcohol and tobacco (n = 141), those who had already used…
		Cannabis		Cocaine		Other illicit drugs^a
Age group (years)	n	%	S.E.	%	S.E.	%	S.E.
18–29	39	64.9	10.0	18.5	7.7	24.7	7.9
30–44	68	77.0	7.9	3.9	2.0	26.9	8.0
45–59	33	57.1	7.8	0.0	0.0	45.9	8.5
⩾ 60	1	–^b	–	–^b	–	–^b	–
Total	141	69.2	5.0	7.5	2.7	30.2	5.4

S.E., Standard error.

Includes sedatives/stimulants/analgesics and any other drugs.

A statistically reliable estimate could not be made.