Table 5.

Estimated ATET of smoking on outpatient service utilization and inpatient service utilization.

	Margin	Unconditional Std. Err.	z	P>z	[95% Cl]
ATET
Outpatient service utilization (Y/N)
(SI < 400 vs. never smoked)	0.068	0.023	2.87	0.004	0.021	0.115
(SI≥400 vs. never smoked)	0.043	0.031	1.38	0.169	−0.018	0.104
Number of outpatient visits (≥3 Times)
(SI < 400 vs. never smoked)	0.031	0.015	2.11	0.035	0.002	0.059
(SI≥400 vs. never smoked)	0.042	0.028	2.00	0.046	0.000	0.082
Inpatient service utilization (Y/N)
(SI < 400 vs. never smoked)	0.063	0.019	3.21	0.001	0.024	0.100
(SI≥400 vs. never smoked)	0.062	0.025	2.45	0.014	0.012	0.110
Number of inpatient visits (≥2 Times)
(SI < 400 vs. never smoked)	0.017	0.013	1.26	0.207	−0.009	0.044
(SI≥400 vs. never smoked)	0.051	0.020	1.99	0.046	0.000	0.080