Table 2.

Parameters for Joinpoint Regression Model and Piecewise Linear Regression Model with Discontinuity

	Applicable Range (Day)	Parameter Estimate	Parameter Standard Error
Parameters for joinpoint regression model
Intercept 1	1–6	0.00143157	0.000067926
Intercept 2	7–29	0.000023988	0.000115451
Intercept 3	30–60	0.007834307	0.00128956
Slope 1	1–6	0.0000773372	0.0000212525
Slope 2	7–29	0.0003119343	0.0000099508
Slope 3	30–60	0.0000515903	0.0000309763
Parameters for piecewise linear regression model with discontinuity
Intercept 1	1–6	0.0014542913	0.0001564724
Intercept 2	7–29	0.0005629491	0.0002404929
Intercept 3	30–60	0.0077530428	0.0008537572
Slope 1	1–6	0.0000729234	0.0000401784
Slope 2	7–29	0.0002754195	0.0000127790
Slope 3	30–60	0.0000560679	0.0000186084