Septic patients without obvious signs of infection at baseline are more likely to die in the ICU.

Although the difference did not reach statistical significance, mean SOFA score at the time of infection diagnosis was also found to be lower if clinical presentation was vague (4.7 [3.2] in the implicit group vs. 5.2 [3.1] in the explicit group, p = 0.09) (Additional file 3 : Table S1).

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