Table 2.
Comparison of outcomes between patients classified as low risk and higher risk by the IMPACT prediction rule
| Total, N (%) N=34 108 |
Low risk, N (%) N=11 025 |
Higher risk, N (%) N=23 083 |
p Value* | |
|---|---|---|---|---|
| In-hospital mortality | 1158 (3.4) | 88 (0.8) | 1070 (4.6) | <0.001 |
| Total treatment cost (mean±SD) | $10 976±$12 240 | $8899±$8344 | $11 972±$13 610 | <0.001 |
| Length of stay (days, mean±SD, %) | 5.2±4.5 | 4.3±3.3 | 5.6±4.9 | <0.001 |
| Within 1 day† | 3160 (9.6) | 1430 (13.1) | 1730 (7.9) | <0.001 |
| Within 2 days† | 7791 (23.6) | 3397 (31.1) | 4394 (20.0) | <0.001 |
| Within 3 days† | 12 715 (38.6) | 5215 (47.7) | 7500 (34.1) | <0.001 |
*p Value for the comparison between low risk and higher risk groups.
†Calculated only when surviving to discharge.
IMPACT, In-hospital Mortality for PulmonAry embolism using Claims daTa.