Table 4.
Univariate comparisons of variables stratified by volume tertiles
| Low volume centre | Medium volume centre | High volume centre | P-value | |
|---|---|---|---|---|
| Mortality (%) | ||||
| Minor | 1.2 | 0.0 | 0.7 | 0.021* |
| Moderate | 2.6 | 1.5 | 1.3 | <0.0001* |
| Major | 2.3 | 2.9 | 3.1 | 0.017* |
| Extreme | 8.5 | 8.9 | 6.5 | <0.0001* |
| Transplant to discharge length of stay (interquartile range) | ||||
| Minor | 8 (6–11) | 8 (6–11) | 8 (6–9) | 0.0018* |
| Moderate | 8 (7–12) | 8 (7–11) | 8 (6–11) | 0.0104* |
| Major | 11 (8–16) | 10 (7–16) | 9 (7–13) | <0.0001* |
| Extreme | 17 (11–27) | 16 (11–27) | 13 (9–24) | <0.0001* |
| ICU length of stay (interquartile range) | ||||
| Minor | 3 (1.5–4) | 3 (2–4) | 2 (1–3) | <0.0001* |
| Moderate | 3 (2–4.3) | 2 (1–4) | 2 (1–4) | <0.0001* |
| Major | 4 (2–8) | 3 (2–6) | 2 (1–5) | <0.0001* |
| Extreme | 10 (4–20.3) | 8 (4–15.3) | 7 (3–17) | 0.0145* |
| Direct cost of transplant to discharge length of stay (interquartile range) | ||||
| Minor | 93 179 (74 957–120 840) | 102 571 (81 145–152 057) | 88 835 (72 530–118 457) | 0.0274* |
| Moderate | 93 369 (72 310–121 448) | 103 770 (81 721–140 415) | 90 624 (74 570–117 520) | <0.0001* |
| Major | 102 399 (78 456–130 240) | 95 325 (78 163–126 796) | 87 693 (75 061–117 906) | <0.0001* |
| Extreme | 110 851 (73 344–165 804) | 105 817 (78 133–157 136) | 98 960 (71 485–147 775) | 0.1646 |
*
P < 0.05 considered statistically significant.