Table 3.
Risk factors for allogeneic blood transfusions
| Variable | Odds Ratio (95% CI) Univariate analysis | p-value | Adjusted Odds Ratio (95% CI) Multivariate analysis | p-value |
|---|---|---|---|---|
| Type of Surgery | <0.001 | <0.001 | ||
| Unilateral | 1 | 1 | ||
| Bilateral | 4.34 (2.81, 6.69) | 5.51 (3.34, 9.01) | ||
| ASA | 0.007 | 0.009 | ||
| Low Risk (1–2) | 1 | 1 | ||
| High Risk (3–4) | 1.73 (1.16, 2.58) | 1.92 (1.18, 3.14) | ||
| Pre-op Haemoglobin | <0.001 | <0.001 | ||
| Normal | 1 | 1 | ||
| Low | 2.20 (1.52, 3.20) | 4.15 (2.48, 6.96) | ||
| Sex | 0.049 | <0.001 | ||
| Male | 1 | 1 | ||
| Female | 1.59 (1.00, 2.52) | 3.44 (1.84, 6.43) | ||
| BMI | 0.098 | 0.008 | ||
| > 30 (Obese) | 1 | 1 | ||
| ≤ 30 (non-Obese) | 1.37 (0.94, 2.00) | 1.79 (1.17, 2.76) | ||
| No. of co-morbidities | 0.048 | 0.379 | ||
| None | 1 | 1 | ||
| 1 | 0.88 (0.56, 1.38) | 0.84 (0.49, 1.42) | ||
| 2 | 1.32 (0.82, 2.12) | 1.06 (0.60, 1.87) | ||
| 3 | 1.54 (0.79, 2.99) | 1.15 (0.51, 2.58) | ||
| 4 | 5.44 (1.25, 23.61) | 4.10 (0.81, 20.77) | ||
| Age | 0.825 | |||
| < 60 years | 1 | |||
| ≥ 60 years | 1.04 (0.72, 1.50) |