Asthma predictive index as a useful diagnostic tool in preschool children: A cross-sectional study in Korea

Dong Hyeon Lee, Ji Won Kwon, Hyung Young Kim, Ju Hee Seo, Hyo Bin Kim, So Yeon Lee, Gwang Cheon Jang, Dae Jin Song, Woo Kyung Kim, Young Ho Jung, Soo Jong Hong, Jung Yeon Shim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Background: It is challenging to diagnose asthma in preschool children. The asthma predictive index (API) has been used to predict asthma and decide whether to initiate treatment in preschool children. Purpose: This study aimed to investigate the association between questionnaire-based current asthma with API, pulmo-nary function, airway hyperreactivity (AHR), fractional expira-tory nitric oxide (FeNO), and atopic sensitization in preschool children. Methods: We performed a population-based cross-sectional study in 916 preschool children aged 4–6 years. We defined current asthma as the presence of both physician-diagnosed asthma and at least one wheezing episode within the previous 12 months using a modified International Study of Asthma and Allergies in Childhood questionnaire. Clinical and laboratory parameters were compared between groups according to the presence of current asthma. Results: The prevalence of current asthma was 3.9% in the study population. Children with current asthma showed a higher rate of positive bronchodilator response and loose and stringent API scores than children without current asthma. The stringent API was associated with current asthma with 72.2% sensitivity and 82.0% specificity. The diagnostic accuracy of the stringent API for current asthma was 0.771. However, no intergroup differences in spirometry results, methacholine provocation test results, FeNO level, or atopic sensitization rate were observed. Conclusion: The questionnaire-based diagnosis of current asthma is associated with API, but not with spirometry, AHR, FeNO, or atopic sensitization in preschool children.

Original languageEnglish
Pages (from-to)104-109
Number of pages6
JournalKorean Journal of Pediatrics
Issue number3
Publication statusPublished - 2020 Mar


  • Allergy
  • Asthma
  • Diagnosis
  • Preschool child
  • Wheezing

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Pediatrics

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