Multiple logistic regression of episodes of wheezing or breathlessness, current asthma, persistent coughing and chronic bronchitis in men (n=26 914) and women (n=30 809) by pack year adjusted by age and body mass index. Nord-Trøndelag, Norway 1997
| Independent variables | Wheezing or breathlessness | Current asthma | Persistent coughing | Chronic bronchitis | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | ||||||||
| Men | |||||||||||||||
| Age (y) | 1.005 | 1.002, 1.007 | 1.008 | 1.004, 1.012 | 0.996 | 0.994, 0.998 | 1.022 | 1.017, 1.026 | |||||||
| Body mass index (kg/m2) | 1.053 | 1.042, 1.064 | 1.050 | 1.034, 1.066 | 1.002 | 0.992, 1.011 | 0.982 | 0.964, 1.001 | |||||||
| Number of pack years | 1.025 | 1.023, 1.028 | 1.015 | 1.011, 1.018 | 1.032 | 1.030, 1.035 | 1.015 | 1.011, 1.020 | |||||||
| Women | |||||||||||||||
| Age (y) | 1.001 | 0.999, 1.003 | 0.998 | 0.995, 1.001 | 0.997 | 0.995, 0.999 | 1.010 | 1,006, 1.014 | |||||||
| Body mass index (kg/m2) | 1.063 | 1.054, 1.070 | 1.062 | 1.051, 1.073 | 1.021 | 1.014, 1.028 | 1.025 | 1.011, 1.040 | |||||||
| Number of pack years | 1.038 | 1.035, 1.042 | 1.030 | 1.025, 1.035 | 1.048 | 1.044, 1.051 | 1.030 | 1.023, 1.036 | |||||||