Table 4.
Association between baseline variables and total perioperative transfusion
| Variable | OR (95% CI) | P value |
|---|---|---|
| Unadjusted (univariate analysis) | ||
| IOHP | 0.62 (0.40 to 0.95) | 0.03 |
| Adjusted (inverse probability of treatment weighting)* | ||
| IOHP | 0.72 (0.44 to 1.16) | 0.18 |
| Adjusted (multivariable analysis) | ||
| IOHP | 0.74 (0.43 to 1.26) | 0.26 |
| Age | 1.00 (0.98 to 1.02) | 0.82 |
| Sex (female) | 1.11 (0.67 to 1.83) | 0.70 |
| Hemoglobin (per 10 g·L−1) | 0.59 (0.50 to 0.71) | <0.001 |
| Creatinine (per 10 µmol·L−1) | 1.12 (1.02 to 1.23) | 0.02 |
| Second resection | 2.33 (1.25 to 4.38) | 0.008 |
| Major resection | 2.15 (1.36 to 3.41) | 0.001 |
| Primary liver cancer | 1.96 (1.11 to 3.46) | 0.02 |
| Combined GI tract surgery | 2.54 (1.13 to 5.70) | 0.02 |
*Controlled for: age, sex, preoperative Hgb and Cr, second liver resections, major resections (≥ 4 segments), resections for primary liver cancer, and combined gastrointestinal procedures.
n = 683 observations (114 events).
CI = confidence interval; GI = gastrointestinal; IOHP = intraoperative hypovolemic phlebotomy; OR = odds ratio.