Table 2.
Patient characteristics for all subjects and by the ability to obtain IVC measurements.
| All available data (n = 63) | (A) IVC measurements available (n = 48) | (B) IVC measurements not available (n = 15) | Comparison (A) vs. (B) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | % | Mean (SD) | N | % | Mean (SD) | N | % | Mean (SD) | p value | |
| Demographics | ||||||||||
| Age | 63 | — | 64.1 (10.9) | 48 | — | 62.8 (12.0) | 15 | — | 68.1 (5.1) | 0.098 |
| Gender | ||||||||||
| Female | 25 | 39.7 | — | 22 | 45.8 | — | 3 | 20.0 | — | 0.074 |
| Male | 38 | 60.3 | — | 26 | 54.2 | — | 12 | 80.0 | — | — |
| Height | 63 | — | 171.0 (9.7) | 48 | — | 170.5 (10.3) | 15 | — | 172.5 (7.5) | 0.485 |
| Weight | 63 | — | 87.3 (15.8) | 48 | — | 83.5 (14.0) | 15 | — | 99.4 (15.6) | <0.001 |
| BMI | 63 | — | 29.6 (5.2) | 48 | — | 28.4 (4.5) | 15 | — | 33.6 (5.5) | 0.001 |
| BSA (m2) | 63 | — | 2.0 (0.5) | 48 | — | 1.9 (0.2) | 15 | — | 2.1 (0.2) | 0.004 |
| ASA physical status | ||||||||||
| 2 | 33 | 52.4 | — | 25 | 52.1 | — | 8 | 53.3 | — | 0.933 |
| 3 | 30 | 47.6 | — | 23 | 47.9 | — | 7 | 46.7 | — | |
|
| ||||||||||
| Health characteristics | ||||||||||
| Hypertension | 32 | 50.4 | — | 23 | 47.9 | — | 9 | 60.0 | — | 0.414 |
| CVD | 2 | 3.2 | — | 2 | 4.2 | — | 0 | — | — | — |
| CAD | 4 | 6.3 | — | 4 | 8.3 | — | 0 | — | — | — |
| Preoperative MAP | 63 | — | 99.7 (13.6) | 48 | — | 99.3 (13.4) | 15 | — | 101 (14.4) | 0.687 |
|
| ||||||||||
| Outcomes | ||||||||||
| MAP < 65 mmHg | 44 | 69.8 | — | 32 | 66.7 | — | 12 | 80.0 | — | 0.520 |
| MAP decrease > 30% preoperative value | 43 | 68.3 | — | 31 | 64.6 | — | 12 | 80.0 | — | 0.350 |
| MAP < 65 mmHg and decrease of > 30% | 31 | 49.2 | — | 24 | 50.0 | — | 7 | 46.7 | — | 0.822 |
ASA, American Society of Anesthesiologists; BMI, body mass index; CVD, cardiovascular disease; IVC, inferior vena cava; MAP, mean arterial pressure (mmHg).