Cow’s milk allergy skin tests: fresh milk, commercial extracts, or both?

Table 2 Predictive values of the different extracts

	Casein	Milk extract	Fresh milk	All extract	Combination of casein and milk extract	Combination of casein and fresh milk
NPV (%)	93.2	93.97	93.33	92.76	92.76	93.24
PPV (%)	58.06	33.87	25.3	72.73	65.38	68
Sensitivity (%)	64.29	75	84	59.26	60.71	62.96
Specificity (%)	91.33	72.67	47.46	95.92	94	94.52
OR	18.97	7.97	4.74	34.18	24.21	29.33

Predictive values of the different extracts in the last skin prick test recorded with a cutoff of SPT ≤ 3 mm as negative result and SPT > 3 mm as positive result for milk extract and casein, and fresh milk. All extract = at least one of the SPT results was negative
The predictive values, sensitivity, specificity, and OR were calculated only for patients who underwent oral food challenge (Groups A1 and B)

ISSN: 1710-1492