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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Psychol Med. 2014 Aug 14;45(5):977–983. doi: 10.1017/S0033291714001986

Table 3. Results from the Cox proportional hazards model for cases of ADHD only and ADHD+stimulants controlling for the number of ADHD registrations and gender in the prediction of future DUD.

HR (95% CI)
ADHD only (no stimulants) 1.69 (1.44–1.99)
 No. of registrations 1.11 (1.10–1.12)
ADHD+stimulants 1.44 (1.20–1.73)
 No. of registrations 1.10 (1.09–1.12)

ADHD, Attention-deficit/hyperactivity disorder; DUD, drug use disorder; HR, hazard ratio, CI, confidence interval.