Table 1.
Baseline characteristics of subjects and study assessments
| Characteristic | Number | Percent |
|---|---|---|
| Patients | 77 | |
| Male | 52 | 68 |
| Age, median (IQR) | 56 (41–67) | |
| Number undergoing 2 assessments | 13 | 17 |
| Number undergoing 3 assessments | 3 | 4 |
| Number undergoing ≥4 assessments | 8 | 10 |
| Assessments | 123 | |
| Site: | ||
| MICU | 45 | 37 |
| SICU | 49 | 40 |
| NICU | 29 | 24 |
| Diagnosis: | ||
| Sepsis | 36 | 29 |
| Trauma | 31 | 25 |
| Postsurgery | 24 | 20 |
| CVA | 21 | 17 |
| Cardiogenic pulmonary edema | 21 | 17 |
| Pneumonia | 20 | 16 |
| PEA or VF arrest | 13 | 11 |
| PE | 10 | 8 |
| ARDS | 10 | 8 |
| Overdose | 9 | 7 |
| Seizure | 7 | 6 |
| Pancreatitis | 7 | 6 |
| COPD | 6 | 5 |
| FiO2 at time of ABG, median (IQR) | 0.40 (0.30–0.50) | |
| PaO2/FiO2, median (IQR) | 250 (180–337) | |
| SpO2 % at time of ABG, median (IQR) | 99 (97–100) | |
| Bilateral opacities on CXR | 42 | 34 |
Patients may have more than one diagnosis at the time of assessment. ABG arterial blood gas, ARDS acute respiratory distress syndrome, COPD chronic obstructive pulmonary disease, CVA Cerebrovascular Accident, CXR chest x-ray, IQR interquartile range, MICU Medical Intensive Care Unit, NICU Neurological Intensive Care Unit, PE Pulmonary Embolism, PEA Pulseless Electrical Activity, SICU Surgical Intensive Care Unit, SpO2 pulse oximetric oxygen saturation, VF Ventricular Fibrillation