BTS | US | p value | 95% CI | |
---|---|---|---|---|
All patients | ||||
n | 89 | 81 | ||
Initial PEF | 215 (72) | 206 (87) | 0.5 | –33 to 16 |
PEF change at 1 hour | 89 (78) | 106 (85) | 0.2 | –8 to 41 |
Patients with PEF ≤75% best at 1 hour | ||||
n | 51 | 48 | ||
PEF on presentation | 194 (53) | 173 (64) | 0.07 | –45 to 2 |
PEF change at 1 hour | 42 (42) | 66 (50) | 0.01 | 6 to 43 |
PEF change at 2 h | 49 (53) | 101 (69) | <0.0001 | 28 to 77 |