Table 5

Crude prevalence of symptoms by asthma diagnosis among responders to the Oslo asthma surveys in 1972 and 1998–1999

Self-reported asthma diagnosis19721998/1999p‐value
Yes
 Wheezing71.7 (67.9–75.5)74.8 (72.3–77.2)0.27
 Attacks of breathlessness57.6 (53.4–61.9)61.9 (59.2–64.7)0.34
No
 Wheezing14.3 (13.7–14.8)20.0 (19.2–20.7)<0.0001
 Attacks of breathlessness10.0 (9.5–10.5)12.0 (11.4–12.5)<0.0001
  • Data are presented as prevalence (95% confidence interval)