Predictive values	95%CI*
SPT	Positive for CN	PPV	35.6% for CN allergy	25.6-46.6%
			88.5% for positive SPT to pistachio	79.9-94.3%
	Positive for pistachio		19.2% for pistachio allergy	12.0-28.4%
			77.8% for positive SPT to CN	68.3-87.5%
	Negative for CN	NPV	16% for negative SPT to pistachio	4.6-35.9%
	Negative for pistachio		30.8% for negative SPT to CN	9.1-61.4%
OFC	Positive for CN	PPV	15.6% for a positive OFC to pistachio	5.3-32.8%
	Positive for pistachio		26.3% for a positive OFC to CN	9.1-51.2%
	Negative for CN	NPV	47.8% for a negative OFC to pistachio	32.9-63%
	Negative for pistachio		19.6% for a negative OFC to CN	26.5-53.2%