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    Patent Pending

    Asthma Predictive Index (API)

    Determines likelihood of pediatric patients developing childhood asthma.
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    INSTRUCTIONS

    This score applies to pediatric patients ≤3 years old.
    When to Use
    Pearls/Pitfalls
    Why Use

    Children/infants 3 years or younger with wheezing episodes.

    • The Asthma Predictive Index (API) provides a method for predicting likelihood of a later diagnosis of asthma, similar to the Modified Asthma Predictive Index (mAPI).
    • The API is only relevant in young children with wheezing.
    • While specificity is good, the score is not a good screening tool — it does not detect many patients who will later be diagnosed with asthma.

    Clinicians may be more aggressive with trials of asthma medications in patients who are likely to be diagnosed with asthma later in life.

    Major Criteria
    Minor Criteria

    Result:

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    Next Steps
    Evidence
    Creator Insights

    Advice

    Consider that bronchodilators or steroids may be helpful in patients with respiratory illnesses, especially if they meet strict criteria for future asthma diagnoses.

    Formula

    Strict Criteria:

    • ≥3 episodes of wheezing per year, AND
    • ≥1 major criteria OR ≥2 minor criteria

    Loose Criteria:

    • <3 episodes of wheezing per year, AND
    • ≥1 major criteria OR ≥2 minor criteria

    Facts & Figures

    In the derivation study:

    • 59% of children with a positive loose index had active asthma at school age (defined at 15 years).
    • 76% of those with a positive strict index had active asthma at school age (defined at 15 years).
    Dr. José Castro-Rodriguez

    About the Creator

    José Castro-Rodríguez, MD, is an assistant professor of pediatrics and family medicine at Pontifica Universidad Católica in Chile. His research focuses on respiratory diseases, such as asthma, bronchitis and tuberculosis, in pediatric patients.

    To view Dr. José Castro-Rodriguez's publications, visit PubMed