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Table 4 Summary of the receiver operating characteristic analyses carried out for the colostrum refractive index (BRIX, %)

From: Genetic characteristics of colostrum refractive index and its use as a proxy for the concentration of immunoglobulins in Holstein cattle

Parameter

Threshold at 50 g/L

Threshold at 60 g/L

Estimate

95% confidence interval

Estimate

95% confidence interval

BRIX cut-off

20.2

 

21.0

 

Specificity

0.85

(0.73, 0.92)

0.89

(0.80, 0.94)

Sensitivity

0.86

(0.82, 0.89)

0.87

(0.83, 0.90)

Positive predictive value

0.98

(0.96, 0.99)

0.98

(0.95, 0.99)

Negative predictive value

0.43

(0.34, 0.53)

0.57

(0.48, 0.65)

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Genetics Selection Evolution

ISSN: 1297-9686