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Table 1 Study design

From: Insights, attitudes, and perceptions about asthma and its treatment: a multinational survey of patients from Europe and Canada

Population

Sampling frame

Interview length

Adults and parents of adolescents (age 12–17 years) with asthma (physician diagnosed and past year medication or asthma symptoms)

Telephone screening of national random digit dialing sample of households

Mean: 37.9 min