|  |  | Duration of | Duration of |  |
---|---|---|---|---|---|
 |  | Extubation after | mechanical ventilation | ICU stay |  |
Group | n | first SBT (%) | (days; mean ± SD) | (days; mean ± SD) | Reintubation (n [%]) |
Protocol group | 47 | 83 | 6.7 ± 6.5 | 9.3 ± 8.2 | 5 (10.6) |
Historical group | 183 | - | 6.2 ± 7.0 | 7.2 ± 8.5 | 23 (17.4) |
Esteban et al. [17] | 205 | 86 | - | 12 | 38 (18.5) |
Ely et al. [7] | 149 | 75.8 | 4.5 | 8 | 5 (3) |
Ely et al. [8] | 1167 | 75.4 | 6 | 9 | 149 (14) |
Kollef et al. [6] | 179 | - | 2.9 ± 5.2 | - | 23 (12.8) |