Table 4

Asthma diagnosis, wheezing and attacks of breathlessness by cumulative cigarette consumption and smoking habit among responders to the Oslo asthma surveys in 1972 and 1998–1999

Cumulative cigarette consumption pack-yrsExsmokersCurrent smokers
Asthma
 51.01 (0.82–1.25)1.01 (0.82–1.24)
 101.10 (0.89–1.35)1.04 (0.85–1.28)
 201.67 (1.25–2.23)1.27 (1.03–1.56)
Wheezing
 51.01 (0.91–1.12)1.03 (0.93–1.14)
 101.07 (0.97–1.19)1.23 (1.12–1.36)
 201.47 (1.25–1.73)3.08 (2.75–3.44)
Attacks of breathlessness
 51.01 (0.90–1.14)1.01 (0.90–1.14)
 101.11 (1.00–1.25)1.11 (0.99–1.24)
 201.82 (1.54–2.16)1.78 (1.58–2.00)
  • Data are presented as odds ratio (95% confidence interval).