Table 3.

Positive predictive value of 90% and 95% of SPT for a positive challenge.

Author, Year	Age	Ø SPT 90%	Ø SPT 95%	Type of Allergen
Eigenmann and Sampson, 1998 [39]	4.6 years		>5 mm	Glycerinate extract
Sporik et al., 2000 [40]	3 years		>8 mm	Glycerinate extract
	<2 years		>6 mm
Calvani et al., 2007 [41]	3.6 years		15 mm	Fresh milk
			12 mm	α-Lactalbumin
			8 mm	Casein
			10 mm	β-lactoglobulin
Calvani et al., 2012 [42]	3.7 years		20 mm	Fresh milk
			10 mm	α-Lactalbumin
			7 mm	Casein
			8 mm	β-Lactoglobulin
Onesimo et al., 2013 [38]	2.7 years		4.9 mm	α-Lactalbumin
			4.3 mm	Casein
			5.6 mm	β-Lactaglobulin
Kido et al., 2016 [43]	1.4 years	15 mm		Glycerinate extract