Table 3.
Association between baseline variables and transfusion on the day of surgery
| Variable | OR (95% CI) | P value |
|---|---|---|
| Unadjusted (univariate analysis) | ||
| IOHP | 0.53 (0.30 to 0.93) | 0.03 |
| Adjusted (inverse probability of treatment weighting)* | ||
| IOHP | 0.53 (0.29 to 0.98) | 0.04 |
| Adjusted (multivariable analysis) | ||
| IOHP | 0.63 (0.33 to 1.23) | 0.18 |
| Age | 1.01 (0.98 to 1.04) | 0.70 |
| Sex, female | 1.00 (0.52 to 1.94) | 0.99 |
| Hemoglobin (per 10 g·L−1) | 0.62 (0.51 to 0.77) | <0.001 |
| Creatinine (per 10 µmol·L−1) | 1.12 (1.02 to 1.24) | 0.02 |
| Second liver resection | 2.86 (1.40 to 5.86) | 0.004 |
| Major resection (≥ 4 segments) | 2.37 (1.30 to 4.30) | 0.005 |
| Primary liver cancer | 2.36 (1.08 to 4.75) | 0.03 |
| Combined GI tract surgery | 0.69 (0.20 to 2.31) | 0.55 |
*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 (56 events)
CI = confidence interval; GI = gastrointestinal; IOHP = intraoperative hypovolemic phlebotomy; OR = odds ratio.