Table 2.
Harmonized RACHS‐1 Risk Adjustment Model for In‐Hospital Mortality
| Derivation Data Set (HCUP SID 2008) | Validation Data Set (HCUP SID 2013) | |||||
|---|---|---|---|---|---|---|
| Odds Ratio | 95% CI | P Value | Odds Ratio | 95% CI | P Value | |
| RACHS‐1 risk category | ||||||
| 1 | 1.00 | — | — | 1.00 | — | — |
| 2 | 1.09 | 0.65–1.82 | 0.75 | 1.30 | 0.66–2.55 | 0.45 |
| 3 | 2.28 | 1.31–3.94 | 0.003 | 2.45 | 1.27–4.72 | 0.008 |
| 4 | 2.78 | 1.57–4.93 | <0.001 | 3.46 | 1.76–6.80 | <0.001 |
| 5+6 | 5.16 | 2.91–9.14 | <0.001 | 7.10 | 3.48–14.5 | <0.001 |
| Age at surgery | ||||||
| ≤28 d | 6.28 | 4.54–8.69 | <0.001 | 6.16 | 4.35–8.71 | <0.001 |
| 29–90 d | 2.96 | 2.16–4.07 | <0.001 | 3.32 | 2.08–5.29 | <0.001 |
| 91–364 d | 1.19 | 0.89–1.59 | 0.23 | 1.80 | 1.23–2.64 | 0.002 |
| 1–17 y | 1.00 | — | — | 1.00 | — | — |
| Birth weight 500–2499 g | 1.96 | 1.49–2.59 | <0.001 | 2.34 | 1.74–3.14 | <0.001 |
| Major noncardiac structural anomaly | 1.27 | 1.06–1.51 | 0.008 | 2.23 | 1.75–2.84 | <0.001 |
| Multiple congenital heart procedures during admission | 2.19 | 1.81–2.66 | <0.001 | 2.15 | 1.75–2.64 | <0.001 |
| Admission type transfer in | 0.96 | 0.76–1.21 | 0.73 | 1.10 | 0.88–1.37 | 0.04 |