Variable | Odds ratio | Standard error | 95Â % confidence interval | p-value |
---|---|---|---|---|
High volume vs. low volume centers | ||||
 Low volume | 2.06 | 0.52 | 1.25 – 3.38 | 0.004 |
 Direct admission | 1.02 | 0.17 | 0.73 – 1.43 | 0.907 |
 Transfer admission | 0.99 | 0.29 | 0.56 – 1.75 | 0.964 |
 Other admission | 1.00 | 0.00 | N/A | 1.000 |
 Age | 1.02 | 0.01 | 1.01 – 1.03 | 0.001 |
 APRDRG risk of mortality | 2.20 | 0.36 | 1.60 – 3.03 | <0.001 |
High volume vs. intermediate volume centers | ||||
 Intermediate volume | 1.45 | 0.41 | 0.83 – 2.54 | 0.195 |
 Direct admission | 0.90 | 0.24 | 0.53 – 1.52 | 0.692 |
 Transfer admission | 0.58 | 0.22 | 0.27 – 1.22 | 0.152 |
 Other admission | 1.00 | 0.00 | N/A | 1.000 |
 Age | 1.03 | 0.01 | 1.01 – 1.05 | 0.005 |
 APRDRG risk of mortality | 3.61 | 1.09 | 2.00 – 6.51 | <0.001 |