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Table 4 Area under the receiver operating curve (AUC) of S-SOFA and SOFA scores for the prediction of different outcome measures and their difference with 95% confidence intervals in the validation cohort and several subgroups (no treatment limitations, ICU treatment, non-ICU treatment)

From: Derivation and validation of a screening tool for stroke-associated sepsis

Predicted outcome

S-SOFA score

SOFA score

Difference

p-value for non-inferiority

Full (n = 391)

    

Poor outcome at 3 months

0.713 [0.665, 0.762]

0.750 [0.703, 0.798]

-0.037 [-0.075, 0]

0.115

Death during hospitalization

0.727 [0.666, 0.788]

0.789 [0.728, 0.849]

-0.062 [-0.12, -0.004]

0.526

Death within 3 months

0.684 [0.632, 0.736]

0.724 [0.672, 0.775]

-0.040 [-0.081, 0.002]

0.169

No treatment limitations (n = 228)

    

Poor outcome at 3 months

0.688 [0.615; 0.761]

0.707 [0.633; 0.781]

-0.019 [-0.073; 0.035]

0.068

Death during hospitalization

0.863 [0.688; 1.038]

0.988 [0.965; 1.01]

-0.125 [-0.279; 0.029]

0.795

Death within 3 months

0.670 [0.567; 0.772]

0.653 [0.534; 0.772]

0.017 [-0.064; 0.098]

0.032

ICU treatment (n = 95)

    

Poor outcome at 3 months

0.770 [0.681, 0.860]

0.780 [0.668, 0.893]

-0.010 [-0.131, 0.111]

0.209

Death during hospitalization

0.678 [0.571, 0.785]

0.756 [0.659, 0.854]

-0.078 [-0.192, 0.035]

0.625

Death within 3 months

0.679 [0.575, 0.782]

0.758 [0.661, 0.856]

-0.080 [-0.195, 0.035]

0.633

ICU treatment and no treatment limitations (n = 50)

    

Poor outcome at 3 months

0.770 [0.648; 0.893]

0.732 [0.59; 0.874]

0.038 [-0.111; 0.187]

0.098

Death during hospitalization

0.831 [0.593; 1.07]

0.940 [0.829; 1.051]

-0.109 [-0.247; 0.029]

0.756

Death within 3 months

0.743 [0.527; 0.958]

0.854 [0.697; 1.011]

-0.111 [-0.29; 0.067]

0.713

Non-ICU treatment (n = 296)

    

Poor outcome at 3 months

0.686 [0.628, 0.745]

0.703 [0.645, 0.761]

-0.017 [-0.055, 0.021]

0.013

Death during hospitalization

0.739 [0.655, 0.822]

0.699 [0.601, 0.798]

0.039 [-0.024, 0.103]

0.001

Death within 3 months

0.678 [0.616, 0.739]

0.693 [0.631, 0.756]

-0.015 [-0.056, 0.025]

0.016

Non-ICU treatment and no treatment limitations (n = 178)

    

Poor outcome at 3 months

0.636 [0.544; 0.729]

0.644 [0.55; 0.737]

-0.008 [-0.07; 0.054]

0.049

Death during hospitalization

-

-

-

-

Death within 3 months

0.647 [0.527; 0.767]

0.597 [0.46; 0.733]

0.051 [-0.033; 0.134]

0.005

  1. If the lower limit of the 95% confidence interval of the difference was greater than or equal to -0.060 (or, equivalently, if the p-value was less than 0.025), the null-hypothesis of inferiority was rejected, and non-inferiority of the S-SOFA score was assumed
  2. Abbreviations: ICU = intensive care unit, SOFA = Sequential Organ Failure Assessment, S-SOFA = Stroke-SOFA