. Author manuscript; available in PMC: 2006 Mar 17.

Published in final edited form as: Arch Gen Psychiatry. 2005 Apr;62(4):435–441. doi: 10.1001/archpsyc.62.4.435

Table 4.

Likelihood of Continuing ADHD Drug Therapy After Formulary Changes^*

	3-Tier Adoption			Tier Changes (04/07/01)
	Intervention (n = 344)	Comparison (n = 199)	PValue	Intervention (n = 360)	Comparison (n = 250)	PValue
Stay, No. (%)	276 (80.2)	169 (84.9)	.17	233 (64.7)	160 (64.0)	.85
Change, No. (%)	36 (10.5)	12 (6.0)	.08	91 (25.3)	56 (22.4)	.41
Stop, No. (%)	32 (9.3)	18 (9.5)	.92	36 (10.0)	34 (13.6)	.17

Abbreviation: ADHD, attention-deficit/hyperactivity disorder.

The first panel of the table includes all children who filled at least two 30-day prescriptions for an ADHD medication, with at least 1 day supplied in the 45 days immediately preceding 3-tier adoption. The second panel includes all children who filled at least two 30-day prescriptions for an ADHD medication, with at least 1 day supplied in the 45 days immediately preceding the April 2001 tier changes. Stay indicates that the child continued using a drug of the same tier: change, that the child changed tiers (ie. switched from using ≥1 drug of a given tier to using ≥1 drug in another tier): and stop, that the child did not use any ADHD medications during the 6 months after the changes. This table does not include children using ADHD medications from more than 1 tier in the 6 months before the respective changes.