Table 3.

Regression coefficients, standard errors, and P-values from the multiple regression analysis type of segmented regression analysis of interrupted time series for models 3 (diagnosis expenses as the dependent variable)

	coefficients	robust std. error	t	sig	95% Conf. Interval
β1	25.78	5.36	4.81	0.000	14.92298	36.64426
β2	−310.78	114.85	− 2.71	0.010	− 543.2738	−78.28034
β3	−35.60	9.85	−3.61	0.001	− 55.54324	−15.64707
β0	4152.46	76.66	54.17	0.000	3997.279	4307.648