Table 2 Univariate logistic regression analysis

  Age ≥ 65 years

1.01

0.99–1.03

0.319

  Male

0.93

0.53–1.62

0.796

Malignancy profile

  Solid tumor

1.04

0.52–2.08

0.911

Vital signs

  Pulse oximetry ≤ 90%

2.37

1.32–4.28

0.004

  RR ≥ 30 per minute

2.70

1.50–4.86

0.001

  SBP < 90 mmHg or DBP ≤ 60 mmHg

0.78

0.41–1.48

0.449

  PR ≥ 125 per minute

1.19

0.66–2.16

0.571

  BT < 35 or ≥ 40 Celsius

0.59

0.07–5.40

0.643

PPS within 24 h of admission

(Compared to PPS ≥ 60)

  PPS 40–50

3.52

1.77-7.00

< 0.001

  PPS ≤ 30

9.51

4.17–21.69

< 0.001

Laboratory

  Hematocrit > 30%

0.91

0.52–1.59

0.745

  WBC < 4 × 10^3 or > 20 × 10^3 per cubic mm

1.40

0.80–2.46

0.241

  Percentage of lymphocytes ≤ 8.0%

2.34

1.33–4.15

0.003

  Sodium < 130 mEq/L

1.16

0.63–2.12

0.636

  Serum glucose ≥ 250 mg/dL

1.34

0.71–2.52

0.369

  BUN ≥ 20 mg/dL

2.22

1.14–4.32

0.020

Co-morbidity

  Congestive heart failure^a

-

-

-

  Cerebrovascular disease

0.96

0.18–5.07

0.962

  Renal disease

0.54

0.15–1.94

0.341

  Liver disease

0.80

0.16–4.04

0.782

Treatment history

  Received chemotherapy within 4 weeks

0.39

0.17–0.88

0.023

  Received chest radiation therapy within 4 weeks

-

-

-