Table 2

Summary of postoperative outcomes within 30 days after spinal surgery

Postoperative complicationsLower half TW AUC for SmO2, N=35Upper half TW AUC for SmO2, N=35P value
TW AUC for SmO2, (%×min×h-19 (1; 53)298 (189; 586)<0.001
Peak hsTnT, ng/L17 (9; 26)24 (10; 33)0.15
MINS12 (34%)16 (46%)0.33
Myocardial infarction00
Non-fatal cardiac arrest00
New-onset arrhythmia1 (3%)2 (6%)0.56
Heart failure00
TCI00
Stroke00
Sepsis1 (3%)1 (3%)1.00
Surgical site infection2 (6%)2 (6%)1.00
Pulmonary complications4 (11%)3 (9%)0.69
Creatinine elevation1 (3%)1 (3%)1.00
ICU admission14 (40%)25 (71%)0.008
Length of postoperative hospitalisation6 (4; 7)6 (6; 8)0.056
 Mortality00
Composite outcome21 (60%)31 (89%)0.006
  • Data are mean±SD for normally distributed variables and median (IQR) for variables with skewed distributions). P values are based on χ2-tests, ANOVA and Wilcoxon rank-sum tests.

  • ANOVA, analysis of variance; hsTnT, high-sensitivity troponin T; ICU, intensive care unit; MINS, myocardial injury after non-cardiac surgery; SmO2, skeletal muscle tissue oxygenation; TCI, transient cerebral ischaemia; TW AUC, time-weighted area under the curve.