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. Author manuscript; available in PMC: 2017 Nov 17.
Published in final edited form as: Methods Inf Med. 2013 Aug 28;52(6):494–502. doi: 10.3414/ME12-01-0093

Table 2.

List of variables considered and respective univariate regression analysis. All lab-related variables refer to serum measurements. OR – odds ratio; CI – confidence intervals.

Variables (units) All patients Pneumonia Pancreatitis
Odds Ratio
(95% CI)
p-value OR
(95% CI)
p-value OR
(95% CI)
p-value
Heart Rate (beats/min) 1.06
(1.02 – 1.10)
0.0056 0.94
(0.88 – 1.01)
0.16 0.69
(0.59 – 0.81)
< 0.001
Temperature (C) 0.86
(0.82 – 0.89)
< 0.001 0.77
(0.72 – 0.83)
< 0.001 0.43
(0.37 – 0.51)
< 0.001
SpO2 (%) 0.89
(0.86 – 0.93)
< 0.001 0.86
(0.81 – 0.93)
< 0.001 1.02
(0.87 – 1.21)
0.770
Respiratory Rate (breaths/min) 0.92
(0.88 – 0.96)
< 0.001 1.12
(1.04 – 1.20)
0.0027 0.97
(0.82 – 1.13)
0.662
GCS Total 0.62
(0.59 – 0.65)
< 0.001 0.70
(0.65 – 0.76)
< 0.001 0.57
(0.48 – 0.67)
< 0.001
Hematocrit (%) 1.31
(1.25 – 1.37)
< 0.001 1.28
(1.19 – 1.37)
< 0.001 1.60
(1.36 – 1.89)
< 0.001
Platelets (103/μL) 0.56
(0.53 – 0.59)
< 0.001 0.46
(0.42 – 0.50)
< 0.001 0.42
(0.34 – 0.51)
< 0.001
WBC – White Blood Cells (103/μL) 1.69
(1.62 – 1.76)
< 0.001 1.62
(1.50 – 1.74)
< 0.001 1.85
(1.55 – 2.19)
< 0.001
Hemoglobin (g/L) 1.37
(1.32 – 1.42)
< 0.001 1.35
(1.26 – 1.45)
< 0.001 1.93
(1.63 – 2.27)
< 0.001
RBC – Red Blood Cells (106/μL) 1.28
(1.23 – 1.33)
< 0.001 1.12
(1.04 – 1.21)
0.0016 1.72
(1.45 – 2.03)
< 0.001
BUN – Blood urea nitrogen (mg/dL) 1.02
(0.98 – 1.06)
0.243 1.06
(0.99 – 1.14)
0.089 0.73
(0.61 – 0.88)
0.002
Creatinine (mg/dL) 1.58
(1.52 – 1.63)
< 0.001 1.55
(1.47 – 1.65)
< 0.001 1.36
(1.19 – 1.57)
< 0.001
Glucose (mg/dL) 0.86
(0.82 – 0.90)
< 0.001 1.05
(0.97 – 1.13)
0.22 0.70
(0.59 – 0.84)
0.001
Potassium (mEq/L) 1.40
(1.35 – 1.46)
0.36 1.01
(0.94 – 1.09)
0.67 1.06
(0.91 – 1.25)
0.425
Chloride (mEq/L) 0.98
(0.94 – 1.02)
< 0.001 1.22
(1.13 – 1.31)
< 0.001 1.16
(0.91 – 1.25)
0.07
Sodium (mEq/L) 0.52
(0.50 – 0.55)
< 0.001 0.65
(0.60 – 0.70)
< 0.001 0.69
(0.58 – 0.82)
< 0.001
Magnesium (mg/dL) 1.15
(0.95 – 1.38)
0.003 0.98
(0.91 – 1.06)
0.74 1.31
(1.11 – 1.54)
0.002
NBP – Non-invasive systolic blood pressure (mmHg) 0.39
(0.37 – 0.41)
< 0.001 0.37
(0.33 – 0.40)
< 0.001 0.54
(0.45 – 0.65)
< 0.001
NBP – Non-invasive mean blood pressure (mmHg) 0.47
(0.45 – 0.49)
< 0.001 0.45
(0.41 – 0.49)
< 0.001 0.57
(0.48 – 0.67)
< 0.001
Arterial pH 0.54
(0.52 – 0.57)
< 0.001 0.47
(0.44 – 0.50)
< 0.001 0.41
(0.34 – 0.48)
< 0.001
Arterial Base Excess (mEq/L) 0.38
(0.36 – 0.40)
< 0.001 0.32
(0.30 – 0.35)
< 0.001 0.49
(0.39 – 0.61)
< 0.001
Lactic Acid (mg/dL) 2.0
(1.97 – 2.11)
< 0.001 2.18
(2.05 – 2.31)
< 0.001 3.09
(2.69 – 3.58)
< 0.001
Urine Output (mL) 0.73
(0.69 – 0.76)
< 0.001 0.66
(0.60 – 0.72)
< 0.001 1.25
(1.05 – 1.48)
0.012
Age (yr) 1.19
(1.14 – 1.24)
< 0.001 1.09
(1.02 – 1.17)
0.015 1.23
(1.40 – 1.25)
< 0.001
SOFA 1.62
(1.54 – 1.70)
< 0.001 1.52
(1.40 – 1.65)
< 0.001 0.77
(0.67 – 0.90)
0.007