Table 3.

Difference in the daily expense on drugs between the pre- and the post-action periods

	Exposure group		Comparison group
	Coefficient	95% CI of change measured in %	Coefficient	95% CI of change measured in %
Beta blocking agents
Post_Action	-0.16**	(-17, -12)	0.03†	(0, 5)
Test Statistic		F (1,552) = 105.97**		F (1,510) = 3.36†
# observations		1106		1022
# patient-hospital groups		553		511
Calcium channel blockers, vascular effects
Post_Action	-0.06**	(-8, -4)	-0.02	(-4, 0)
Test Statistic		F (1,634) = 26.44**		F (1,566) = 2.49
# observations		1270		1134
# patient-hospital groups		635		567
ACE inhibitors, plain
Post_Action	-0.06**	(-9, -2)	0.01	(-1, 4)
Test Statistic		F (1,271) = 10.69**		F (1,287) = 0.95
# observations		544		576
# patient-hospital groups		272		288

** p < 0.01; * p < 0.05; ^† p < 0.1.