Epidemiology Research International

Research Article

Validation of the ISAAC Standardized Questionnaire Used by Schoolchildren from Mexicali, Baja California, Mexico

Table 3

Classification of the study population according to gold standard (percentage change in FEV1, average concentration of FeNO levels, and atopic condition).
  Clinical test (gold standard)Total
  AsthmaticsNonasthmatics
Questionnaire ISAACAsthmatics19423
Nonasthmatics355691
 Total5460114
Sensitivity: ; specificity: .
Predictive positive value: ; predictive negative value: .