Table 5.

Substance use and substance-related problems as a function of onset of medical use and nonmedical use of stimulant medication (medical and nonmedical users only)

	Model 17 Cigarette Smoking	Model 18 Binge Drinking	Model 19 Marijuana Use	Model 20 Cocaine Use	Model 21 Other Drug Use	Model 22 Nonmedical Rx Drug Use	Model 23 Positive DAST-10	Model 24 Positive CRAFFT
Lifetime Medical Users Only (n = 322)	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI
Age of medical onset of prescription stimulants (continuous measure)	1.11** [1.02, 1.20]	1.10* [1.00, 1.22]	1.14*** [1.05, 1.23]	.912 [.670, 1.24]	1.16* [1.01, 1.33]	1.05 [.934, 1.19]	1.10* [1.01, 1.19]	1.21*** [1.11, 1.32]
	Model 25 Cigarette Smoking	Model 26 Binge Drinking	Model 27 Marijuana Use	Model 28 Cocaine Use	Model 29 Other Drug Use	Model 30 Nonmedical Rx Drug Use	Model 31 Positive DAST-10	Model 32 Positive CRAFFT
Lifetime Nonmedical Users Only (n = 124)	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI	AOR 95% CI
Age of nonmedical onset of prescription stimulants (continuous measure)	.912 [.733 , 1.13]	.818 [.656 , 1.01]	.950 [.726 , 1.24]	.566*** [.408 , .785]	.845 [.686, 1.04]	.755* [.598, .952]	.745* [.567 , .978]	.851 [.629 , 1.15]

^*p<.05,

^**p<.01,

^***p<.001;

AOR=adjusted odds ratio; 95% CI=95% confidence interval. Note: : Models 17 through 24 control for gender, race, grade level of respondent, highest level of parental education, ADHD symptom severity, past year nonmedical use of stimulants, conduct disorder symptom severity, number of waves respondent participated in the SSLS, and wave respondent participated in the SSLS. Models 25 through 32 control for gender, race, grade level of respondent, highest level of parental education, lifetime ADHD diagnosis, ADHD symptom severity, past year medical use of stimulants, number of waves respondent participated in the SSLS, and wave respondent participated in the SSLS. All variables used in the analyses were time-varying.