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Table 3 Uni- and multivariable logistic regression models for the prediction meningitis and/or encephalitis with identified infectious pathogens by CSF parameters (excluding protozoal infections)

From: Predictors of infectious meningitis or encephalitis: the yield of cerebrospinal fluid in a cross-sectional study

Logistic regression

 

Univariable

Multivariable

Hosmer-Lemeshow

Pearson’s

 

OR

95% CI

p-value

OR

95% CI

p-value

X2

p-value

X2

p-value

CSF parameters for infection

 White blood cells (per106/l)

1.00

0.99–1.00

0.283

1.00

0.99–1.00

0.141

13.50

0.096

305.7

0.321

 Protein (per mg/l)

1.01

1.00–1.01

< 0.001

0.99

0.99–1.00

0.852

    

 Lactate (per 0.1 mmol/l)

1.29

1.18–1.42

< 0.001

1.11

0.93–1.34

0.254

    

 Glucose ratio (per 0.1unit)

0.01

0.01–0.06

< 0.001

0.05

0.01–0.37

0.003

    

Multinomial logistic regression

 

Univariable

Multivariable

  
 

RR

95% CI

p-value

RR

95% CI

p-value

    

CSF parameters for bacterial infection

 White blood cells (per106/l)

1.00

1.00–1.01

0.039

0.58

0.18–1.89

0.368

    

  Polynuclear cells (per 106/l)

1.01

1.00–1.01

< 0.001

1.72

0.53–5.60

0.368

    

  Mononuclear cells (per 106/l)

1.01

1.00–1.01

< 0.001

1.72

0.53–5.61

0.367

    

 Protein (per mg/l)

1.01

1.00–1.01

< 0.001

1.00

0.99–1.00

0.982

    

 Lactate (per 0.1 mmol/l)

1.55

1.38–1.75

< 0.001

1.34

1.04–1.71

0.021

    

 Glucose ratio (per 0.1unit)

0.01

0.00–0.01

< 0.001

0.01

0.00–0.17

0.003

    

CSF parameters for viral infection

 White blood cell count (per106/l)

1.00

0.99–1.00

0.103

0.62

0.30–1.29

0.203

    

  Polynuclear cells (per 106/l)

0.99

0.99–1.00

0.208

1.61

0.77–3.33

0.204

    

  Mononuclear cells (per 106/l)

1.01

1.00–1.01

< 0.001

1.62

0.78–3.36

0.198

    

 Protein (per mg/l)

1.00

0.99–1.00

0.634

1.00

1.00–1.00

0.925

    

 Lactate (per 0.1 mmol/l)

1.02

0.87–1.18

0.830

1.00

0.76–1.30

0.997

    

 Glucose ratio (per 0.1unit)

0.09

0.01–0.60

0.012

0.10

0.10–1.02

0.052

    

Multinomial logistic regression

 

Forward selection

Backward selection

Hosmer-Lemeshow

Pearson’s

 

RR

95% CI

p-value

RR

95% CI

p-value

X2

p-value

X2

p-value

CSF parameters for bacterial infection

 White blood cells (per106/l)

 

NS

  

NS

     

  Polynuclear cells (per 106/l)

 

NS

  

NS

     

  Mononuclear cells (per 106/l)

 

NS

  

NS

     

 Protein (per mg/l)

 

NS

  

NS

     

 Lactate (per 0.1 mmol/l)

1.35

1.12–1.64

0.002

1.35

1.12–1.64

0.001

6.58

0.583

135.8

0.14

 Glucose ratio (per 0.1unit)

0.01

0.00–0.23

0.004

0.10

0.00–0.23

0.004

    

CSF parameters for viral infection

 White blood cell count (per106/l)

 

NS

  

NS

     

  Polynuclear cells (per 106/l)

 

NS

  

NS

     

  Mononuclear cells (per 106/l)

1.01

1.00–1.01

< 0.001

1.01

1.00–1.01

< 0.001

9.46

0.305

194.1

0.39

 Protein (per mg/l)

 

NS

  

NS

     

 Lactate (per 0.1 mmol/l)

 

NS

  

NS

     

 Glucose ratio (per 0.1unit)

 

NS

  

NS

     
  1. CSF cerebrospinal fluid, OR odds ratio, CI confidence interval, NS not selected
  2. Boldp-values indicate significance set at < 0.05