Sex effects for asthma diagnosis, wheezing and attacks of breathlessness by study year among responders to the Oslo asthma surveys in 1972 and 1998–1999
| 1972 | 1998–1999 | |
| Asthma diagnosis | 0.92 (0.76–1.11) | 1.47 (1.27–1.70) |
| Wheezing | 0.97 (0.89–1.06) | 1.00 (0.90–1.10) |
| Attacks of breathlessness | 1.49 (1.35–1.65) | 1.54 (1.38–1.72) |
Data are presented as odds ratio (95% confidence interval) (females versus males).