Table III.

Segmented linear regression regarding overall treatments

Rate of drug survival	Coefficient	SE	(95% CI)	p-value
Full model: segmented linear regression (2012 to 2018)
Baseline level, β0	0.69	0.05	(0.59–0.80)	< 10–4
Baseline trend, β1	−0.0005	0.01	(–0.02–0.02)	0.96
Change in level after 2016, β2	−0.05	0.06	(–0.19–0.09)	0.47
Change in trend after 2016, β3	−0.0004	0.02	(–0.04–0.04)	0.98
Final model*: simple linear regression (2001 to 2019)	−0.006	0.004	(–0.01–0.002)	0.13
Trend

SE: standard error; 95% CI: 95% confidence interval. Significant value is given in bold.