Demographic and baseline characteristics of patients
| Variables | Results | 95% confidence interval | ||
|---|---|---|---|---|
| *No (%). All other results in this column are mean (SD). | ||||
| Men/women | 9/9 (50/50)* | |||
| Age, years | 42.9 (2.7) | 41.5 to 44.2 | ||
| Duration of attack prior to ED presentation, hours | 59.2 (39.0) | 39.8 to 78.5 | ||
| Heart rate, beats/min | 94.6 (5.6) | 91.8 to 97.3 | ||
| Blood pressure, mm Hg | ||||
| Systolic | 127.6 (16.6) | 119.3 to 135.8 | ||
| Diastolic | 77.5 (12.8) | 71.1 to 83.8 | ||
| Respiratory rate, breaths/min | 22.4 (4.2) | 20.3 to 24.4 | ||
| FEV1, L | 0.9 (0.3) | 0.8 to 1.1 | ||
| FEV1, % predicted | 32.2 (10.9) | 26.7 to 37.6 | ||
| SpO2, % | 94.7 (2.7) | 93.3 to 96.0 | ||
| pH | 7.4 (0.0) | 7.4 to 7.4 | ||
| PaO2, mm Hg | 76.6 (11.7) | 70.7 to 82.4 | ||
| PaCO2, mm Hg | 35.9 (3.3) | 34.2 to 37.5 | ||
| HCO3, mmol/l | 22.5 (1.3) | 21.8 to 23.1 | ||
| Na, mmol/l | 138.5 (2.5) | 137.2 to 139.7 | ||
| K, mmol/l | 3.8 (0.2) | 3.7 to 3.9 | ||
| Cl, mmol/l | 101.6 (3.0) | 100.1 to 103.0 | ||
| Lactate, mmol/l | 1.1 (0.4) | 0.9 to 1.3 | ||