Table 3.

Estimated per-capita and annual medical expenditure by costs category associated with ADHD

	Predicted Costs with ADHD (A)	Predicated costs Without ADHD (B)	Expenditure Difference (A-B)	National Annual Expenditure Associated with adult ADHD (Billions)
Total direct costs	9616.08 (8340.09, 10,876.02)	7025.02 (6894.72, 7181.07)	2591.06 (1471.71, 4684.57)*	8.29 (4.71, 14.98)
Inpatient visits	1494.19 (981.40, 234.07)	1685.97 (1588.23, 1754.02)	− 191.78 (− 707.11, 601.36)	− 0.61 (− 2.26, 1.94)
Prescription medication	3009.45 (2616.97, 3259.54)	1662.39 (1602.13, 1718.73)	1347.06 (990.69, 1625.93)*	4.31 (3.17, 5.20)
Outpatient visits	1105.17 (580.70, 1534.12)	638.58 (606.53, 672.53)	466.59 (− 29.70, 912.64)	1.49 (− 0.10, 2.92)
Emergency room visits	251.78 (169.10, 305.98)	256.94 (242.91, 268.53)	− 5.16 (− 79.56, 46.60)	− 0.02 (− 0.25, 0.15)
Office − based visits	2392.36 (1833.92, 3192.67)	1667.50 (1624.34, 1704.32)	724.86 (177.75, 1528.62)*	2.32 (0.57, 4.89)
Home health visits	446.59 (217.22, 723.55)	335.87 (303.25, 373.27)	110.71 (− 112.33, 373.99)	0.35 (− 0.36, 1.20)

Estimated 3.20 million adults with ADHD

^*Statistically significant at p < 0.05