Table 4.
Recalibrated RACHS‐1 and RACHS‐ANZ Models Applied to the Population Used for the Original Version of RACHS‐1, and the Final RACHS‐ANZ Model Applied to the Population Inclusive of Children With Acquired Heart Disease and Adults With Congenital Heart Disease
| Recalibrated RACHS‐1a | RACHS‐ANZ—Limiteda | RACHS‐ANZ—Final Model | ||
|---|---|---|---|---|
| OR (95% CI) | OR (95% CI) | OR (95% CI) | Coefficient (95% CI) | |
| RACHS 1 (reference) | 1.0 | 1.0 | 1.0 | ··· |
| RACHS 2 | 1.20 (0.53–2.74) | 1.38 (0.61–3.14) | 1.23 (0.57–2.67) | 0.2081 (−0.5666 to 0.9828) |
| RACHS 3 | 2.88 (1.31–6.34) | 3.09 (1.41–6.76) | 2.74 (1.32–5.69) | 1.0071 (0.2747–1.7395) |
| RACHS 4 | 5.51 (2.42–12.54) | 5.70 (2.54–12.76) | 5.09 (2.39–10.87) | 1.6280 (0.8704–2.3856) |
| RACHS 5 | 22.25 (6.41–77.16) | |||
| RACHS 6 | 16.14 (6.94–37.55) | |||
| RACHS 5 or 6 | 13.18 (5.76–30.20) | 11.23 (5.14–24.55) | 2.4189 (1.6371–3.2008) | |
| Neonate | 4.32 (2.84–6.56) | |||
| Infant | 2.07 (1.35–3.18) | |||
| Premature | 2.37 (1.72–3.28) | |||
| Combination procedure | 1.39 (1.08–1.80) | |||
| Major noncardiac structural anomaly | 2.46 (1.73–3.48) | |||
| ICU before surgeryb | 2.21 (1.68–2.89) | 2.29 (1.76–2.99) | 0.8294 (0.5648–1.0940) | |
| Weight <4.0 kg (per kg)c | 2.35 (1.89–2.92) | 2.34 (1.89–2.89) | 0.8482 (0.6352–1.0612) | |
| Days <2 y (per d)d | 1.0008 (1.0001–1.0014) | 1.0008 (0.0002–1.0014) | 0.000780 (0.000160–0.001399) | |
| Constant | −5.7416 (−6.4577 to −5.0256) | |||
ANZ indicates Australia and New Zealand; ICU, intensive care unit; OR, odds ratio; RACHS, Risk Adjustment for Congenital Heart Surgery Score.
Limited to those aged 18 years or less without acquired heart disease.
ICU before surgery: code as 1 if the patient was managed in ICU immediately before surgery or 0 if the patient was admitted to ICU for recovery following surgery.
Weight <4.0 kg=4.0—weight in kg. Code as zero if weight ≥4.0 kg.
Days <2 years=730—age in days. Code as zero if age ≥730 days.