Table 1.

Descriptive statistics of individuals admitted to clinic over the 5.5-year study period with and without ADHD. Individuals with clinically-diagnosed ADHD were significantly younger, more likely to have cocaine use disorder, and more likely to be privately insured than individuals without an ADHD diagnosis. Age is represented as the population mean in years +/− standard deviation; p-values reflect t-test or chi-squared statistical significance.

	All admitted individuals	ADHD	No ADHD	p-value
n	2163	203	1960	-
Age	44 +/−14	38 +/−11	45 +/−14	p <0.001
Female	37%	43%	37%	p = 0.64
White	87%	89%	86%	p = 0.92
Private insurer	46%	64%	44%	p <0.001
Cocaine use disorder	14%	31%	12%	p <0.001