Table 4.
Effect of age/BMI on outcome. Results are presented as adjusted and unadjusted OR for each outcome. Age/BMI group 2 (age/BMI > 1.0 & <2.0), group 3 (age/BMI > 2.0 & <3.0), and group 4 (age/BMI > 3.0) were compared to the reference group 1 (age/BMI < 1.0).a
| Age/BMI Groups | ||||
|---|---|---|---|---|
| Outcome | Group 1 | Group 2 | Group 3 | Group 4 |
| Mortality N (%) | 35 (0.04) | 235 (0.11) | 428 (0.41) | 379 (1.57) |
| OR Unadj | Reference | 2.76 (1.93–3.93)* | 10.46 (7.41–14.76)* | 40.68 (28.77–57.53)* |
| OR Adj | Reference | 2.26 (1.57–3.24)* | 5.01 (3.52–7.13)* | 13.13 (9.19–18.77)* |
| Wound outcome N (%) | 361 (0.41) | 1,555 (0.72) | 1,440 (1.38) | 467 (1.94) |
| OR Unadj | Reference | 1.77 (1.58–1.99)* | 3.43 (3.06–3.85)* | 4.86 (4.23–5.58)* |
| OR Adj | Reference | 1.84 (1.49–2.27)* | 2.45 (1.98–3.02)* | 2.68 (2.11–3.40)* |
| Cardiac outcome N (%) | 20 (0.02) | 261 (0.12) | 438 (0.42) | 218 (0.90) |
| OR Unadj | Reference | 5.36 (3.40–8.45)* | 18.73 (11.96–29.32)* | 40.68 (25.73–64.32)* |
| OR Adj | Reference | 3.43 (1.74–6.78)** | 5.93 (3.03–11.63)* | 8.66 (4.36–17.19)* |
| Respiratory outcome N (%) | 254 (0.28) | 1,121 (0.52) | 1,348 (1.29) | 629 (2.61) |
| OR Unadj | Reference | 1.82 (1.58–2.08)* | 4.57 (3.99–5.22)* | 9.38 (8.10–10.86)* |
| OR Adj | Reference | 1.61 (1.27–2.03)* | 2.05 (1.62–2.59)* | 2.31 (1.80–2.96)* |
| Urinary outcome N (%) | 56 (0.06) | 340 (0.16) | 373 (0.36) | 110 (0.46) |
| OR Unadj | Reference | 2.49 (1.88–3.31)* | 5.69 (4.30–10.07)* | 7.30 (5.29–10.07)* |
| OR Adj | Reference | 1.74 (1.14–2.66)** | 1.74 (1.13–2.66)** | 1.27 (0.79–2.04) |
| CNS outcome N (%) | 9 (0.01) | 54 (0.02) | 95 (0.09) | 72 (0.30) |
| OR Unadj | Reference | 2.46 (1.22–4.98)** | 8.99 (4.54–17.82)* | 29.66 (14.84–59.32)* |
| OR Adj | Reference | 1.54 (0.59–4.02) | 3.34 (1.32–8.47)** | 7.66 (2.98–19.70)* |
| Thromboembolism N (%) | 154 (0.17) | 483 (0.22) | 402 (0.38) | 148 (0.61) |
| OR Unadj | Reference | 1.29 (1.07–1.54)** | 2.23 (1.85–2.68)* | 3.57 (2.85–4.48)* |
| OR Adj | Reference | 1.42 (1.02–1.99)** | 1.72 (1.22–2.41)** | 1.92 (1.31–2.82)** |
| Sepsis N (%) | 347 (0.39) | 1,689 (0.78) | 1,817 (1.74) | 713 (2.96) |
| OR Unadj | Reference | 2.01 (1.79–2.25)* | 4.52 (4.03–5.07)* | 7.80 (6.86–8.88)* |
| OR Adj | Reference | 1.78 (1.47–2.16)* | 2.25 (1.85–2.72)* | 2.51 (2.03–3.10)* |
| Return to OR N (%) | 637 (0.71) | 1,869 (0.86) | 1,386 (1.32) | 478 (1.98) |
| OR Unadj | Reference | 1.21 (1.10–1.32)* | 1.87 (1.70–2.05)* | 2.81 (2.50–3.17)* |
| OR Adj | Reference | 1.22 (1.03–1.45)** | 1.42 (1.19–1.69)** | 1.55 (1.26–1.91)* |
| Composite morbidity N (%) | 974 (1.09) | 4,183 (1.93) | 4,314 (4.12) | 1,702 (7.06) |
| OR Unadj | Reference | 1.78 (1.66–1.91)* | 3.89 (3.63–4.18)* | 6.88 (6.35–7.45)* |
| OR Adj | Reference | 1.71 (1.51–1.94)* | 2.16 (1.91–2.46)* | 2.57 (2.23–2.95)* |
a
Variables considered and adjusted in the multivariate analysis were: underlying medical conditions [congestive heart failure within 30 days prior to surgery, severe COPD, acute renal failure (pre-operative), bleeding disorders, cancer, ascites within 30 days prior to surgery], preoperative treatments (dialysis, ventilation, chemotherapy, radiation therapy, and ASA classification.
*
p < 0.0001.
**
p < 0.05.