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. 2021 Dec 18;11(12):3587. doi: 10.3390/ani11123587

Table 4.

Sensitivities (Se), specificities (Sp), and correlations for measurements of IgG concentration in different studies with the colostrometer compared to the gold standard.

Standard Se Sp Correlation Source
RID n. d. n. d. 0.43 [58] 1
RID 0.75 0.78 n. d. [1] 1
RID 0.76 0.66 n. d. [1] 1
RID n. d. n. d. 0.67 [59] 1
RID n. d. n. d. 0.79 [44] 1
RID 0.84 0.77 0.77 [7] 1
RID 0.73 0.72 n. d. [10] 1
RID 0.71 0.61 n. d. [10] 1
RID 0.69 0.81 0.57 [5] 1
RID n. d. n. d. 0.83 [34] 1
ELISA 0.93 0.69 n. d. [31] 1
Refractometer n. d. n. d. 0.89 [60] 1
Refractometer n. d. n. d. 0.86 [44] 1

n. d. = no data. 1 Cut-off point of ≥50 mg IgG mL−1 for colostrum of good quality