Table 2.
Baseline and Index HRU by PIF Group
| R-2 | R-5 | |||||
|---|---|---|---|---|---|---|
| Low PIF < 60 L/min (n = 423) | High PIF ≥ 60 L/min (n = 320) | P value | Low PIF < 30 L/min (n = 109) | High PIF ≥ 30 L/min (n = 634) | P value | |
| During index hospitalization | ||||||
| LOS (days), median (IQR) | 4.99 (3.30, 8.00) | 3.98 (2.81, 5.84) | < 0.001 | 6.37 (4.04, 10.15) | 4.19 (2.93, 6.54) | < 0.001 |
| ICU visit during admission, n (%) | 155 (36.6) | 81 (25.3) | 0.001 | 49 (45.0) | 187 (29.5) | 0.002 |
| ICU LOS (days), median (IQR) | 0.00 (0.00, 1.98) | 0.00 (0.00, 0.53) | 0.001 | 0.00 (0.00, 2.48) | 0.00 (0.00, 1.25) | 0.001 |
| Time from PIF to discharge (days), median (IQR) | 2.24 (1.18, 4.27) | 1.94 (1.00, 3.13) | < 0.001 | 3.19 (1.24, 5.21) | 2.07 (1.10, 3.34) | < 0.001 |
| In the year before index hospitalization | ||||||
| Inpatient hospitalizations, median (IQR) | 1.00 (0.00, 2.00) | 1.00 (0.00, 2.00) | 0.473 | 1.00 (0.00, 2.00) | 1.00 (0.00, 2.00) | 0.846 |
| ICU days, median (IQR) | 0.00 (0.00, 0.00) | 0.00 (0.00, 0.00) | 0.413 | 0.00 (0.00, 0.00) | 0.00 (0.00, 0.00) | 0.056 |
Abbreviations: HRU, healthcare resource utilization; ICU, intensive care unit; IQR, interquartile range; LOS, length of stay; PIF, peak inspiratory flow; R-2, medium-low resistance; R-5, high resistance.