Skip to main content

Table 2 Receiver operating characteristic (ROC) curve analysis for determination of cutoff value for the salivary analytes investigated in pigs with meningitis

From: Changes in salivary biomarkers of stress, inflammation, redox status, and muscle damage due to Streptococcus suis infection in pigs

 

Area under the ROC curve (AUC)

95% CI

P values

Cutoff value

Sensitivity (%)

Stress

     

Alpha-amylase (U/L)

0.96

0.96-1

< 0.001

2224

95.24

Cortisol (ng/mL)

0.71

0.53–0.88

0.03

46.40

81.25

Oxytocin (pg/mL)

0.79

0.64–0.95

0.005

2071

89.47

Inflammation

     

Haptoglobin (mg/L)

0.69

0.52–0.86

0.02

2.50

72.73

ITIH4 (µg/L)

0.73

0.56–0.91

0.023

21.23

68.75

Total proteins (mg/dL)

0.92

0.81-1

0.002

199

83.33

S1000A8-A9 (mg/L)

0.89

0.69–0.96

< 0.001

0.175

85

S100A12 (mg/mL)

0.88

0.77–0.99

< 0.001

491.2

83.33

Redox status

     

FRAS (µmol/L)

0.58

0.33–0.84

0.49

0.26

62.5

AOPP (µmol/L)

0.76

0.52-1

0.04

118.5

87.5

Muscle damage

     

Creatine kinase (U/L)

0.73

0.57–0.89

0.012

98.55

77.78

Creatine kinase – myocardial band (ng/mL)

0.77

0.56–0.99

0.027

50.60

70

Troponin I (ng/mL)

0.68

0.52–0.84

0.029

0.207

75

Lactate (mmol/L)

0.69

0.51–0.87

0.042

10.50

70.59

Lactate dehydrogenase (µkat/L)

0.87

0.76–0.98

0.001

55.15

82.35

Aspartate aminotransferase (U/L)

0.84

0.72–0.97

0.003

160.7

81.25

Alanine aminotransferase (U/L)

0.78

0.59–0.98

0.023

17.85

88.89

Sepsis

     

Procalcitonin (ng/mL)

0.86

0.64–0.96

0.01

2940

75

Aldolase (U/L)

0.79

0.62–0.97

0.014

18.35

88.89

Immune system

     

Adenosine deaminase (U/L)

0.92

0.87-1

< 0.001

7680

92.96

  1. ITIH4: inter-alpha trypsin inhibitor 4; FRAS: ferric reducing ability of saliva; AOPP: advanced oxidative protein products