Table I.
Basic characteristics.
| Variable | Group-1 (n=899) | Group-2 (n=601) | p-value |
|---|---|---|---|
| Age, years | 42.34±15.52 | 43.57±8.76 | 0.052 |
| Gender (male/female) | 723/176 | 466/135 | 0.177 |
| GOLD stage, N (%) | |||
| II | 104 (11.6) | 80 (13.3) | 0.172 |
| III | 246 (27.4) | 140 (23.3) | |
| IV | 549 (61.1) | 381 (63.4) | |
| Days on mechanical ventilation | 6.34±2.45 | 6.50±2.01 | 0.182 |
| APACHE II score | 14.48±2 | 14.32±2 | 0.125 |
| pO2 | 97.85±9.79 | 98.97±12.12 | 0.059 |
| pCO2 | 47.57±7.29 | 47.24±6.53 | 0.368 |
| RSBI score | 109.28±23.26 | 115.42±31.16 | <0.001 |
| FiO2 | 33.49±8.77 | 34.07±8.98 | 0.217 |