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Table 3 Comparison of survival and non-survival amongst cases and controls: demographics and perioperative characteristics

From: Outcomes of post-cardiac surgery patients with persistent hyperlactatemia in the intensive care unit: a matched cohort study

  Non-survivors (n = 19) Survivors (n = 405) p-value
Preoperative characteristics    
 Gender (male) 11 (57.9 %) 263 (64.9 %) 0.62
 Age (years) 75 (56–87) 70 (42–89) 0.05
 Parsonnet score 30.5 (16.5–49) 16.5 (0–52.5) <0.0001
 Congestive heart failure 12 (63.2 %) 170 (41.9 %) 0.06
 Renal failurea 9 (47.4 %) 42 (10.4 %) <0.0001
 Severe peripheral vascular disease 5 (26.3 %) 25 (6.2 %) 0.007
 Reoperation 3 (15.8 %) 8 (2 %) 0.005
 Chronic obstructive pulmonary diseaseb 7 (36.8 %) 51 (12.6 %) .008
Postoperative characteristics    
 Peak arterial lactate ≥3.0 mmol/L 15 (78.9 %) 129 (31.8 %) <0.0001
 Peak creatinine μmol/L 127 (66–840) 100 (39–1013) <0.0001
 Intra-aortic balloon pump 6 (31.6 %) 37 (9.2 %) 0.008
 CT chest /abdomen 2 (10.5 %) 2 (0.5 %) 0.01
 Return to OR 5 (26.3 %) 22 (5.4 %) 0.005
 Cardiogenic shock 5 (26.3 %) 6 (1.5 %) <0.0001
 Post-operative cardiac hemorrhage 2 (10.5 %) 11 (2.7 %) 0.01
 Acute kidney injury (AKIN 1) 16 (84.2 %) 125 (32.2 %) <0.0001
 Non-obstructive ileus 1 (5.5 %) 2 (0.5 %) 0.13
 Ischemic bowel 1 (5.5 %) 0 0.05
  1. Data is expressed as: number of patients (frequency in percentage) or median (range)
  2. aAcute or chronic renal failure
  3. bCOPD on medical treatment