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Table 4 Results of the difference-in-differences logistic regression analyses

From: Hospital quality reporting and improvement in quality of care for patients with acute myocardial infarction

Variable Unadjusted mortality Risk-adjusted mortality Mortality of PCI patients admitted by ambulance Aspirin within 2 days
OR (95% CI) P OR (95% CI) P OR (95% CI) P OR (95% CI) P
Reporting hospital 1.01 (0.83–1.24) 0.916 0.99 (0.78–1.24) 0.905 0.98 (0.65–1.49) 0.933 0.97 (0.73–1.23) 0.815
Year that reporting started 1.01 (0.87–1.18) 0.870 1.07 (0.89–1.28) 0.467 1.03 (0.77–1.37) 0.861 1.05 (0.86–1.27) 0.637
Years after start of reporting 1.02 (0.89–1.17) 0.819 1.01 (0.90–1.13) 0.868 0.99 (0.74–1.32) 0.920 1.07 (0.93–1.23) 0.327
Interaction terma 0.98 (0.80–1.22) 0.879 0.98 (0.81–1.17) 0.789 1.18 (0.83–1.66) 0.351 1.03 (0.81–1.30) 0.826
  1. aThe interaction term of the reporting status and the post-enrollment time variable represents the influence per year exerted by reporting on the outcomes
  2. Abbreviations: CI confidence interval, OR odds ratio, PCI percutaneous coronary intervention
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