Table 1. Baseline demographics and comparison between the two study groups.
| Characteristic | PEEP5 (n=50) | PEEPEIT (n=50) |
|---|---|---|
| Sex (M/F) | 21/29 | 23/27 |
| Age (years) | 69.0±3.3 | 70.2±4.3 |
| BMI (kg∙m-2) | 23.2±3.1 | 24.3±4.5 |
| ASA classification (II/III) | 39/11 | 39/11 |
| Smokes (yes/no) | 12/38 | 9/41 |
| Drinks alcohol (yes/no) | 7/43 | 2/48 |
| Hypertension (yes/no) | 14/36 | 17/33 |
| Diabetes (yes/no) | 5/45 | 3/47 |
| MVV (%predicted) | 115.6±22.5 | 118.3±30.5 |
| FEV1 (% predicted) | 86.5±14.2 | 92.2±18.7 |
| Transfusion volume (mL) | 1,290±422 | 1,241±416 |
| Operation time (min) | 93±41 | 87±54 |
| Procedure | ||
| Pneumonectomy | 1 | 0 |
| Wedge resection | 12 | 9 |
| Lobectomy | 30 | 37 |
| Wedge + lobectomy | 7 | 4 |
M, male; F, female; BMI, body mass index; MVV %predicted, ratio of measured value to theoretical predicted value of maximal ventilatory volume; FEV1, forced expiratory volume in 1 second.