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. 2017 Dec 12;21:301. doi: 10.1186/s13054-017-1888-6

Table 2.

Assessment of prediction scores

Total Survivors Non-survivors AUC 95% CI p value Hosmer–Lemeshow statistic (χ2; p value) Pairwise comparison to PRESET-Score (difference between areas; p value)
Derivation cohort (n) 108 41 67
 ECMOnet-Score 4.5 (3; 6) 4 (3; 5) 5 (4; 7) 0.695 0.59–0.79 0.001 3.7; 0.876 0.127; 0.0260
 RESP-Score –1 (–6; 3) 1 (–3; 4) –2 (–7; 2) 0.645 0.53–0.75 0.012 8.4; 0.395 0.178; 0.0045
 PRESERVE-Score 4 (3; 6) 4 (2; 5) 5 (3; 6) 0.593 0.48–0.71 0.106 5.2; 0.396 0.230; 0.0010
 Roch-Score 3 (3; 4) 3 (2; 4) 3 (3; 4) 0.564 0.45–0.68 0.269 5.4; 0.020 0.259; 0.0003
 PRESET-Score 7 (5; 10) 5 (4; 7) 8 (7; 11) 0.823 0.74–0.90 < 0.001 2.9; 0.940
Internal validation cohort (n) 82 37 45
 PRESET-Score 6 (5; 10) 4 (4; 6) 8 (6; 11) 0.845 0.76–0.93 < 0.001 10.9; 0.207
External validation cohort (n) 59 31 28
 PRESET-Score 7 (5; 9) 6 (4; 8) 8 (7; 10) 0.700 0.56–0.83 0.008 4.2; 0.655

Variables presented as median (first quartile; third quartile)

ARDS acute respiratory distress syndrome, AUC area under the curve, CI confidence interval, ECMO extracorporeal membrane oxygenation, PRESERVE-Score Predicting Death for Severe ARDS on VV-ECMO, PRESET-Score PREdiction of Survival on ECMO Therapy-Score, VV veno-venous