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Characteristics of the population
| Age (years) | 66.3 ± 11 |
| M/F | 19/11 |
| BMI (kg/m2) | 28.9 ± 6.6 |
| SAPS II | 58.6 ± 20.7 |
| Known pulmonary disease | 17 (56.6 %) |
| Known heart disease | 11 (36.6 %) |
| ARDS | 15 (50 %) |
| Post study tracheotomy | 10 (33 %) |
| Duration of ventilatory support (days) | 32.8 ± 21.6 |
| ICU LOS (days) | 35.9 ± 21 |
| Mortality at day 28 | 5 (16.7 %) |
| Overall mortality | 10 (33.3 %) |
Data are presented as mean ± SD or number (%)
