TABLE 2.

Likelihood of Switching Among Established Users of Bipolar Therapy^*

	Adjusted Odds Ratios
	Maine (n = 5336)		New Hampshire (n = 1376)		Risk Ratios (ME Versus NH)
	Phase-in Versus Prepolicy†	Post Versus Prepolicy	Phase-in Versus Prepolicy	Post Versus Prepolicy	Phase-in Versus Prepolicy	Post Versus Prepolicy
All established users	1.19 (1.04, 135)‡	1.13 (1.00, 1.29)	1.15 (0.88, 1.51)	1.27 (0.96, 1.67)	1.03 (0.76, 139)	0.90 (0.66, 1.22)
Using preferred agents prior to switch	1.19 (0.90, 1.57)	0.82 (0.63, 1.06)	0.92 (0.56, 1.51)	1.04 (0.64, 1.69)	1.29 (0.73, 2.28)	0.78 (0.45, 1.35)
Using nonpreferred agents prior to switch	1.06 (0.90, 1.25)	1.12 (0.95, 1.31)	1.16 (0.81, 1.68)	1.31 (0.91, 1.89)	0.91 (0.61, 1.36)	0.85 (0.57, 1.26)

^*Generalized Estimating Equations models control for age, gender, Medicare/Medicaid dual enrollment status, number of unique medications, and inpatient hospitalizations during the past 6 months.

^†Prepolicy, July 2002 to April 2003; phase-in period, May 2003 to July 2003; policy, August 2003 to February 2004.

^‡P [H11021] 0.05.