Table 1.
Patient demographics and background
| High ACI (n = 11) |
Low ACI (n = 40) |
P value | ||
|---|---|---|---|---|
| Age (years) | Median (range) | 73 (69–82) | 67 (36–84) | 0.108 |
| Gender | (%) | |||
| Male | 9 (81.8) | 35 (87.5) | 0.635 | |
| Female | 2 (18.2) | 5 (12.5) | ||
| ASA classification | (%) | |||
| 2 or less | 11 (100) | 37 (92.5) | 1.000 | |
| 3 or more | 0 (0) | 3 (7.5) | ||
| Height (cm) | mean (SD) | 165 (8.1) | 165 (8.5) | 0.866 |
| Weight (kg) | Mean (SD) | 57 (9.8) | 62 (12.4) | 0.189 |
| Body mass index (kg/m2) | Mean (SD) | 20.8 (2.6) | 22.6 (2.8) | 0.067 |
| Body surface area (m2) | Mean (SD) | 1.61 (0.16) | 1.68 (0.19) | 0.296 |
| Intra-abdominal volume (L) | Mean (SD) | 2.88 (0.50) | 1.89 (0.41) | < 0.0001 |
| Intra-abdominal pressure (mmHg) | Mean (SD) | 8.18 (0.60) | 8.85 (1.00) | 0.040 |
| Abdominal compliance index (L/m2) | Mean (SD) | 1.77 (0.19) | 1.13 (0.24) | < 0.0001 |
ACI abdominal compliance index, ASA American Society of Anesthesiologists