. Author manuscript; available in PMC: 2010 Apr 21.

Published in final edited form as: J Drug Issues. 2008 FALL;38(4):1045–1060. doi: 10.1177/002204260803800406

Table 2.

Patterns of nonmedical use of prescription stimulants and/or analgesics, by other nonmedical use.

Prescription Stimulant Users	Stimulants Only n=117 M(SE)	Stimulants and Analgesics n=65 M(SE)

Age of onset (stimulants)	17.3 (.2)^a	16.9 (.2)^a
Lifetime frequency of use	16.8 (3.7)	22.6 (5.1)
Ever inhaled (%)	4.3^a	13.9^a
Number of other drugs ever used	1.5 (.1)^abc	3.4 (.1)^ad

Prescription Analgesic Users	Analgesics Only n=85 M(SE)	Stimulants and Analgesics n=65 M(SE)

Age of onset (analgesics)	17.1 (.2)	17.2 (.2)
Lifetime frequency of use	8.9 (5.7)	14.3 (6.8)
Ever inhaled (%)	8.2	15.4
Number of other drugs ever used	2.2 (.1)^bef	3.4 (.1)^e

Nonusers
Number of other drugs ever used	0.8 (.1)^cdf

^abc Groups that share the same superscript are significantly different (p<.05), as determined in simple pairwise comparisons of least squares means. All comparisons control for the effects of race, sex, and mother's education. For the number of other drugs used, the same result is reported twice for the stimulantsand-analgesics group, to assist the reader in interpreting comparisons; however, all comparisons were performed in one regression model.