Schatz et al classified the severity of asthma in pregnant women. This modified the criteria of the National Asthma Education and Prevention Program (NAEPP) by the inclusion of daily asthma medication use. The authors are from multiple universities in the United States, the National Institute of Child Health and Development, the Maternal-Fetal Medicine Units Network and the National Heart, Lung, and Blood Institute.


Patient selection: pregnant female with cough, dyspnea or wheezing in past 6 months



(1) frequency of asthma symptoms during the past 4 weeks (excludes symptoms due to an upper respiratory tract infection)

(2) use of daily asthma medications

(3) FEV1 as percent of predicted





frequency of symptoms

0 to 7 days

8 or more days


asthma medications

not being taken daily

drug other than oral steroid taken daily

regular use of oral corticosteroids for 4+ weeks


> 80%

60 to 80%

< 60%



• Drugs for moderate severity include: (1) 2 puffs or more of inhaled beta-agonist, (2) 1 or more doses of theophylline per day, (3) 4 or more puffs of inhaled ipratropium, (4) 2 or puffs of inhaled cromolyn, (5) 2 or more puffs of inhaled nedocromil, or (6) 2 or more puffs of inhaled steroids.

• A "mild-to-moderate" category might be needed for patients who take less than the required number of puffs per day.


To read more or access our algorithms and calculators, please log in or register.