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Table 3 AUC-ROC of baseline mechanical power, 24-h MP and power variation rate for ICU mortality in different populations

From: Twenty-four-hour mechanical power variation rate is associated with mortality among critically ill patients with acute respiratory failure: a retrospective cohort study

Population Number of patients ICU mortality, n (%) APACHE II score AUC-ROC (95% CI) for baseline MP AUC-ROC (95% CI) for 24-h MP AUC-ROC (95% CI) for 24-h MP variation rate
Unselected ICU patients 8597 405 (4.7) 13 (10, 17) 0.752 (0.743–0.761)
ARF at baseline with mechanical ventilation > 48 h 1925 322 (16.7) 18 (13, 23) 0.634 (0.612–0.655) 0.613 (0.591–0.635) 0.508 (0.485–0.531)*
ARF with baseline MP > 10 J/min 602 166 (27.8) 20 (15, 26) 0.595 (0.554–0.634) 0.630 (0.590–0.669) 0.584 (0.543–0.623)
ARF with baseline MP > 15 J/min 107 43 (40.2) 23 (18, 30) 0.526 (0.427–0.623) 0.683 (0.586–0.769) 0.683 (0.586–0.770)*
  1. AUC-ROC, areas under curve of receiver operating characteristic; CI, confidence interval; ICU, intensive care unit; ARF, acute respiratory failure; MP, mechanical power
  2. *p < 0.05 compared with AUC-ROC of baseline MP as reference by DeLong’s test