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Better PSI Performance Associated CAH Conversion: Alternative Explanations
- Changes in coding behaviors
- Did not find any significant change in hospital-level mean number of DX, mean Charlson score, mean number of Elixhauser comorbidities
- Changes in referral patterns (get less severe patients)
- No significant change in
- Percentage of patients transferred from other hospitals
- Percentage of patients transferred to other hospitals
- Models adjusting for referral behaviors show consistent results
- It reflects a trend toward improvement in patient safety for all hospitals
- None-converted hospitals are comparison group
- Add year dummy variables
- Difference in difference
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