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Table 3 Odds ratios for the association between transfusion and outcomes for patients who underwent coronary artery bypass graft surgery

From: Hospital variation in transfusion and infection after cardiac surgery: a cohort study

Outcomes: Number (%) with outcome Odds ratio for autologous transfusion (95% CI)* P value Odds ratio for allogeneic transfusion (95% CI)* P value
Elective surgery:      
   In-hospital infection 1,305 (11.4%) 1.02 (0.56, 1.86) 0.936 1.98 (1.59, 2.46) < 0.001
   In-hospital mortality 325 (2.8%) 0.96 (0.12, 7.69) 0.968 4.67 (2.38, 9.18) < 0.001
   30-day readmission to hospital 2,488 (22.3%) 0.70 (0.44, 1.12) 0.140 1.43 (1.25, 1.65) < 0.001
   30-day readmission for infection 402 (3.6%) 0.94 (0.39, 2.24) 0.881 1.09 (0.82, 1.46) 0.555
   30-day post-discharge mortality 155 (1.4%) 1.06 (0.13, 8.69) 0.957 2.88 (1.38, 5.98) 0.005
Urgent or emergency surgery:      
   In-hospital infection 2,702 (20.3%) 1.99 (1.12, 3.55) 0.019 1.82 (1.51, 2.20) < 0.001
   In-hospital mortality 637 (4.8%) 1.24 (0.16, 9.68) 0.837 3.82 (2.18, 6.70) < 0.001
   30-day readmission to hospital 3,610 (28.5%) 1.36 (0.79, 2.34) 0.266 1.68 (1.44, 1.96) < 0.001
   30-day readmission for infection 543 (4.3%) 1.88 (0.72, 4.90) 0.199 1.39 (1.00, 1.93) 0.052
   30-day post-discharge mortality 290 (2.3%) NE NE 4.65 (1.90, 11.39) 0.001
  1. The comparison group consisted of patients who received no transfusions.
  2. *Adjusted for propensity score, surgical volume and hospital volume.
  3. NE = not estimable due to small numbers.