Table 2. Diagnostic performances of variables elected by univariate analyses
Sensitivity, % Specificity, % NPV, % PPV, %
Tree pollen allergy 37.0 88.1 42.0 85.7
Ever wheezing 66.7 59.5 48.1 76.1
Nocturnal cough 30.9 90.5 40.4 86.3
FEF75 < 65% 30.9 85.7 39.1 80.6
Abbreviations: FEF75, forced expiratory flow at 75 percent of vital capacity; NPV, negative predictive value; PPV, positive predictive value. Abbreviations: FEF75, forced expiratory flow at 75 percent of vital capacity; NPV, negative predictive value; PPV, positive predictive value. Abbreviations: FEF75, forced expiratory flow at 75 percent of vital capacity; NPV, negative predictive value; PPV, positive predictive value. Abbreviations: FEF75, forced expiratory flow at 75 percent of vital capacity; NPV, negative predictive value; PPV, positive predictive value. Abbreviations: FEF75, forced expiratory flow at 75 percent of vital capacity; NPV, negative predictive value; PPV, positive predictive value.