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Difference-in-difference estimates of mean total charge per patient
| Time interval | Observed mean total charge among PSP | Expected mean total charge among PSP | Difference | p value |
|---|---|---|---|---|
| Pre (12-month total) | $17,062 | $17,062 | – | – |
| During (4-month total) | $11,022 | $12,608 | −$1586 | 0.588 |
| Post (12-month total) | $14,814 | $22,339 | −$7525 | 0.008 |
