Table 3.
ROC curve analysis of SBCT performance in predicting NIRS in different subgroups of patients.
| SBCT in Patients Not Requiring NIRS |
SBCT in Patients Requiring NIRS |
p-Value | |
|---|---|---|---|
| Patients without chronic respiratory disease | 30.7 ± 7.5 | 25.3 ± 5.1 | <0.0001 |
| Patients not needing supplemental oxygen therapy | 30.1 ± 7.5 | 26.7 ± 3.0 | 0.007 |
| Patients needing supplemental oxygen therapy | 32.0 ± 0.0 | 20.8 ± 8.6 | 0.003 |
| Patients without dyspnea at rest | 31.5 ± 4.2 | 24.5 ± 3.2 | <0.0001 |
| Patients with PaO2/FiO2 > 280 | 29.7 ± 7.9 | 20.0 ± 6.6 | 0.0001 |
| Patients with SpO2/FiO2 > 438 | 30.1 ± 7.9 | 27.3 ± 3.8 | 0.135 |
| Patients with normal respiratory rate | 30.2 ± 8.1 | 25.1 ± 3.2 | 0.0001 |
| Patients with normal respiratory rate and absence of dyspnea at rest | 31.9 ± 4.5 | 25.1 ± 3.3 | <0.0001 |
Abbreviations: NIRS, non-invasive respiratory strategies; SBCT, single-breath counting test.