Skip to main content

Table 2 Univariate analysis for primary outcome

From: Early warning score: a dynamic marker of severity and prognosis in patients with Gram-negative bacteraemia and sepsis

Scale variables Alive mean ± STD Dead mean ± STD 95 % CI p value
 Age 69 ± 17 75 ± 15 2 to 12 0.01
 Charlson’s co-morbidity index 4.8 ± 2.9 6.7 ± 2.5 0.8 to 2.5 0.0001
 Temperature at the time of BSI 38.3 ± 1 37.5 ± 1.4 −1.2 to −0.4 0.0001
 Mean arterial pressure at onset of GNBSI 83 ± 17 73 ± 16 −16 to −6 0.0001
 Oxygen saturation at onset of GNBSI 95.5 ± 3.4 93.9 ± 5.9 −2.8 to −0.3 0.015
 Glasgow coma scale 14.7 ± 0.7 13.7 ± 1.8 −1.5 to −0.5 0.0001
 Sequential Organ Failure (SOFA) 2.9 ± 2.3 5.8 ± 3.5 1.9 to 3.9 0.0001
 EWS at the onset of GNBSI 3.4 ± 2.2 5.6 ± 2.6 1.4 to 2.8 0.0001
 C-reactive protein 134 ± 104 190 ± 127 18 to 93 0.004
 Serum bicarbonate 23 ± 5 20 ± 5 −3.6 to −0.6 0.007
 Time interval-admission to GNBSI (days) 6.4 ± 14 10 ± 14 −0.7 to 7.8 0.1
 Time interval-collection to positivity (h) 1.6 ± 0.8 1.2 ± 0.6 −0.5 to −0.1 0.001
 Time to first antibiotic (h) 18.7 ± 22.8 10.7 ± 17 −13.8 to −2.3 0.006
 Time to appropriate antibiotic (h) 19.6 ± 24 14.6 ± 18 −12.8 to 2.4 0.186
 Time to source control (days) 1.9 ± 2.1 0.64 ± 0.8 −3.2 to 0.6 0.18
Categorical variable Percentage Percentage   p value
 Gender: female/male 79/76 21/24   0.5
 BSI onset: hospital/community 64/85 36/15   0.0001
 BSI onset: out of h/routine h 81/73 19/27   0.147
 Patient on oxygen/not on oxygen 57/89 43/11   0.009
 On vasopressor/not on vasopressor 46/79 54/21   0.009
 Polymicrobial BSI/monomicrobial BSI 55/80 45/20   0.007
 ESBL positive/ESBL negative 73/78 27/22   0.7
 Source of BSI: unknown/hepato-biliary 65/90 35/10   0.033