Table 2.

Regression coefficients, standard errors, and P-values from the multiple regression analysis type of segmented regression analysis of interrupted time series for models 2(medical service expenses as the dependent variable)

	coefficients	robust std. error	t	sig	95% Conf. Interval
β1	−14.93	3.46	− 4.32	0.000	− 21.92152	−7.92853
β2	197.75	73.99	2.67	0.011	47.97305	347.5245
β3	−4.25	6.35	−0.67	0.507	−17.1051	8.596238
β0	2811.98	49.38	56.94	0.000	2712.011	2911.952