Figure 3.

Association of post-discharge health services utilization within 7 days, 14 days, and 30 days of discharge with 30-day readmission hospital length of stay (a) and readmission inpatient costs (b) (n = 583,199). Notes: (i) In multivariable two-part models, average marginal effect (AME) and 95% confidence interval (CI) were adjusted for 7 different types of post-discharge care (institutional outpatient, primary care physician, specialist, non-physician provider, emergency department, home health care, skilled nursing facility) and all other explanatory variables listed in Table 2. (ii) The AME represents the difference in adjusted predicted outcome (i.e., 30-day readmission hospital length of stay per IA discharge, and inpatient costs per IA discharge) between patients who did and did not utilize each post-discharge service. (iii) p <0.05 if 95% CI does not include zero. (iv) Full estimation results for 30-day readmission length of stay, and costs are presented in Appendix Tables 2 and 3 (panel A), respectively.