| N | Average | Standard deviation | Min | Max | p -value | |
|---|---|---|---|---|---|---|
| Total | 2,634 | $23,408.06 | $13,179.94 | $6,788.39 | $205,659.05 | 0.002 |
| Low-volume hospital | 1,090 | $22,510.06 | $11,195.74 | $6,985.27 | $156,817.65 | |
| High-volume hospital | 1,544 | $24,042.01 | $14,387.03 | $6,788.39 | $205,659.05 |
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