Table 6.

ITSA for multiple groups

Regression with Newey–West standard errors					Number of obs = 192
Maximum lag: 2					F (7, 184) = 42.12
					Prob > F = 0.0000
Number of inpatients	Coef.	Std. Err.	t	P > |t|	[95% Conf. Interval]
_t	−2.09	1.45	−1.44	0.151	−4.95	0.77
_z	24.05	55.02	0.44	0.663	−84.51	132.6
_z_t	−2.11	2.9	−0.73	0.469	−7.83	3.62
_x37	110.16	47.89	2.3	0.023	15.67	204.65
_x_t37	2.59	1.76	1.47	0.142	−0.88	6.05
_z_x37	−69.91	76.37	−0.92	0.361	− 220.59	80.77
_z_x_t37	12.56	3.26	3.85	0.000	6.13	18.99
_cons	285.75	23.82	12	0.000	238.76	332.74
Comparison of linear post-intervention trends: 37
Linear Trend	Coeff	Std. Err.	t	P > |t|	[95% Conf. Interval]
Treated	10.95	0.99	11.0466	0.000	8.99	12.91
Controls	0.50	0.92	0.5382	0.591	−1.32	2.32
Difference	10.45	1.35	7.7216	0.000	7.78	13.13