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Table 4 Difference-in-Differences Models

From: Readmission rates in not-for-profit vs. proprietary hospitals before and after the hospital readmission reduction program implementation

  DiD Model 1 Parameter Estimate (SE) DiD Model 2 Parameter Estimate (SE) DiD Model 3 Parameter Estimate (SE) DiD Model 4 Parameter Estimate (SE) DiD Model 5 Parameter Estimate (SE)
Intercept 16.16 (0.10)* 22.68 (1.20)* 15.64 (0.22)* 17.57 (0.29)* 22.72 (1.21)*
Not-for-profit Indicator −0.31 (0.11)* − 0.42 (0.10)* −0.44 (0.10)* − 0.38 (0.11)* −0.44 (0.11)*
Year 2012 Indicator −0.38 (0.10)* −0.39 (0.10)* − 0.40 (0.10)* −0.38 (0.09)* − 0.41 (0.10)*
Not-for-profit * Year 2012 (DiD term) −0.10 (0.11) n.s. − 0.10 (0.11) n.s. −0.08 (0.11) n.s. − 0.10 (0.11) n.s. −0.08 (0.11) n.s.
Log Median Income   −0.59 (0.11)*    −0.65 (0.11)*
CMI 2010    0.37 (0.14)*   0.45 (0.15)*
Emergency Department     −1.44 (0.29)* −0.07 (0.29) n.s.
AICC 19,704 18,250 19,081 19,679 18,037
BIC 19,715 18,265 19,092 19,690 18,049
  1. *The asterisk denotes statistically significant estimates at the alpha = 0.05 level