The influences of Taiwan's generic grouping price policy on drug prices and expenditures: Evidence from analysing the consumption of the three most-used classes of cardiovascular drugs

Table 4 Difference in the number of days of prescription 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	0.57**	(68, 86)	0.61**	(73, 95)
Test Statistic		F (1,552) = 459.97**		F (1,510) = 378.21**
# observations		1106		1022
# patient-hospital groups		553		511
Calcium channel blockers, vascular effects
Post_Action	0.52**	(60, 76)	0.66**	(83, 106)
Test Statistic		F (1,634) = 418.20**		F (1,566) = 518.10**
# observations		1270		1134
# patient-hospital groups		635		567
ACE inhibitors, plain
Post_Action	0.50**	(52, 78)	0.47**	(49, 73)
Test Statistic		F (1,271) = 154.52**		F (1,287) = 150.38**
# observations		544		576
# patient-hospital groups		272		288

ISSN: 1471-2458