Table 3.

Covariate-Adjusted Outcomes in the Propensity-Matched Cohort and Landmark Cohort^*

Multistate Models	PS-Matched Cohort				Landmark Cohort
	HR	LL	UL	P Value	HR	LL	UL	P Value
Unplanned all-cause rehospitalization	0.83	0.77	0.9	<0.001	0.87	0.82	0.93	<0.001
Unplanned COPD rehospitalization	0.856	0.76	0.965	0.0108	0.927	0.862	0.998	0.0439
Unplanned non-COPD rehospitalization	0.788	0.712	0.872	<0.001	0.856	0.802	0.915	<0.001

D efinition of abbreviations: COPD = chronic obstructive pulmonary disease; HR = hazard ratio; LL = lower limit; PS = propensity score; UL = upper limit.

^*Covariate-adjusted models with robust SEs accounting for multiple rehospitalizations within patients and competing risk of mortality.