Table 2: Assessment of the ability of modified API to predict time course development of asthma in adolescence in the study population.

Asthma at the follow-up end pointSensitivity % (CI-95%)Specificity % (CI-95%)PPV %(CI-95%)NPV %(CI-95%)Area under the ROC curveCorrectly predicted, %

Positive API87 (79–92)37 (28–47)61 (53–68)71 (57–82)0.6268.7

PPV: positive predictive value; NPV: negative predictive value.
ROC: receiver operating characteristic curve.
API: asthma predictive index.