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%