Table 1.

Versions of the Asthma Predictive Index

Criteria	Stringent API5	Loose API5	Modified API6, 7
Wheezing	Early (≤3 years) frequent wheezing*	Early (≤3 years) wheezing	≥4 episodes/yr during first 3 years of life
Major criteria
Parent with asthma	Yes	Yes	Yes
MD-diagnosed Atopic dermatitis	Yes	Yes	Yes
Sensitization to ≥1 aeroallergen	Not included	Not included	Yes
Minor criteria
Wheezing unrelated to colds	Yes	Yes	Yes
Blood eosinophils ≥4%	Yes	Yes	Yes
MD-diagnosed Allergic rhinitis	Yes	Yes	Not included
Sensitization to foods (milk, egg, peanut)	Not included	Not included	Yes
For a positive API in each version, children must meet the wheezing criterion as well as at least 1 major criterion or at least 2 minor criteria.

^*Score of ≥3 on scale of 1–5 for wheezing (1 = ”very rarely”, 5 = ”most days”).