Table 3.

Results of the segmented regression analysis for expenditure*

		Time		Drug price reduction		Time after drug price reduction		New guideline		Time after new guideline
	Group	Estimate	p Value	Estimate	p Value	Estimate	p Value	Estimate	p Value	Estimate	p Value
Antihypertensive drug costs (USD)	All	0.0839	<0.001	−1.3796	<0.001	−0.0149	0.048	−0.3182	<0.001	−0.2010	<0.001
	Health insurance	0.0858	<0.001	−1.3828	<0.001	−0.0164	0.033	−0.3524	<0.001	−0.1956	<0.001
	Medical aid	0.0532	0.015	−1.3792	<0.001	0.0142	0.679	0.2265	0.199	−0.2901	<0.001
Antihypertensive drug cost per prescribing day (USD)	All	0.0021	<0.001	−0.0424	<0.001	−0.0002	0.443	−0.0066	<0.001	−0.0074	<0.001
	Health insurance	0.0022	<0.001	−0.0423	<0.001	−0.0003	0.298	−0.0074	<0.001	−0.0073	<0.001
	Medical aid	0.0009	0.182	−0.0453	<0.001	0.0011	0.318	0.0055	0.258	−0.0094	<0.001

*All results were adjusted by age, sex, region, insurance type, Charlson comorbidity index and combinations of hypertension agents.