Table 3

Correlations between area under curves (AUCs) and outcomes based on Spearman’s rank correlation coefficient analysis

Parameters and thresholdsAUC>0 (n) *Length of hospital stayComposite complication
R valueP valueR valueP value
MAP <50 mm Hg370.30.10.30.07
MAP <60 mm Hg610.30.030.30.02
MAP <70 mm Hg850.20.050.20.04
MAP >100 mm Hg900.20.060.30.001
MAP >110 mm Hg770.20.10.30.01
MAP >120 mm Hg690.20.060.20.08
Temp <35°C44−0.060.70.10.4
Temp <35.5°C700.060.60.20.06
Temp <36°C850.040.70.10.2
Temp >37°C290.30.20.20.4
Temp >37.5°C8NENENENE
Temp >38°C1NENENENE
SpO<90%100.30.40.30.4
SpO<95%16−0.20.50.30.3
HR <40 bpm2NENENENE
HR <50 bpm240.20.50.30.2
HR <60 bpm53−0.050.7−0.10.5
HR >90 bpm230.60.0050.40.07
HR >100 bpm180.40.10.40.1
HR >110 bpm14−0.020.9−0.40.2
PI <0.540−0.030.8−0.20.3
PI <1650.20.070.080.5
PI >625−0.080.70.30.2
PI >103NENENENE
iVt <5 mL/kg1010.40.00020.40.0003
iVt <6 mL/kg1010.40.00010.40.0001
iVt >8 mL/kg1NENENENE
iVt >9 mL/kg1NENENENE
iVt >10 mL/kg0NENENENE
aVt <5 mL/kg790.0071.00.20.1
aVt <6 mL/kg94−0.010.90.020.9
aVt >8 mL/kg320.20.30.10.5
aVt >9 mL/kg19−0.20.30.090.7
aVt >10 mL/kg110.30.30.10.7
Ppeak <10 cmH2O460.10.50.30.06
Ppeak <15 cmH2O680.040.80.20.2
Ppeak >25 cmH2O320.010.90.010.9
Ppeak >30 cmH2O120.080.8−0.20.5
Ppeak >35 cmH2O4NENENENE
PEEP <3 cmH2O53−0.10.5−0.060.7
PEEP >7 cmH2O170.20.60.30.3
PEEP >10 cmH2O6NENENENE
EtCO>25 mm Hg39−0.10.5−0.050.8
EtCO>30 mm Hg620.10.30.060.7
EtCO>40 mm Hg630.050.70.090.5
EtCO>45 mm Hg340.20.4−0.020.9
FiO<0.356NENENENE
FiO<0.4521−0.20.3−0.20.4
FiO>0.75960.10.20.20.05
FiO>0.85860.20.10.20.07
SctO<50%6NENENENE
SctO<55%13−0.10.7−0.30.4
SctO<60%27−0.20.20.090.6
SctO>75%680.20.10.20.1
SctO>80%370.040.80.030.9
SctO>85%8NENENENE
SctO>90%2NENENENE
SstO<50%160.10.6−0.10.7
SstO<55%22−0.10.5−0.30.3
SstO<60%32−0.20.3−0.20.2
SstO>75%870.030.80.10.2
SstO>80%710.10.40.090.4
SstO>85%450.040.8−0.090.6
SstO>90%90.60.060.30.5
  • *Analysis was not attempted if the number of patients whose measurements were beyond a given threshold was ≤8. Only patients whose AUCs were >0 were included in analysis.

  • NE, not estimable.