Table 2.
Baseline characteristics of the patients included
| VV group (n=79) | CV group (n=83) | P-value | |
|---|---|---|---|
| Age (year) | 67.8±6.8 | 67.1±7.7 | 0.54 |
| Gender | |||
| Male | 33 (41.8%) | 30 (36.1%) | |
| Female | 46 (58.2%) | 53 (63.9) | 0.46 |
| ASA physical status | |||
| II | 42 (53.2%) | 50 (60.2%) | |
| III | 37 (46.8%) | 33 (39.8%) | 0.36 |
| BMI (kg/m2) | 22.3±2.4 | 22.1±3.0 | 0.64 |
| MMSE (score) | 28.8±1.7 | 28.9±1.8 | 0.72 |
ASA, American Society of Anesthesiologists; MMSE, Mini-Mental State Examination; BMI, Body Mass Index; VV, variable ventilation; CV, conventional ventilation. P-values were calculated by Chi-square test or Mann-Whitney U-test.