FEV1 (L) | FVC (L) | FEV1:FVC | ||||
β | 95% CI | β | 95% CI | β | 95% CI | |
All* | ||||||
Smoking rate | n=327†‡§ | n=326‡§¶ | n=326‡§** | |||
Never-smoker | Reference | Reference | Reference | |||
Regular smoker 1–14 cigarettes/day | −0.091 | −0.274 to 0.092 | 0.003 | −0.182 to 0.188 | −0.026 | −0.056 to 0.004 |
Regular smoker ≥15 cigarettes/day | −0.348 | −0.541 to − 0.154 | −0.086 | −0.281 to 0.110 | −0.084 | −0.116 to − 0.053 |
Per 10 cigarettes/day | −0.168 | −0.256 to − 0.080 | −0.047 | −0.136 to 0.042 | −0.039 | −0.053 to − 0.025 |
Cumulative smoking | n=325†§†† | n=324§¶†† | n=324§**†† | |||
Regular smoker 1–199 cigarette-years | −0.050 | −0.268 to 0.167 | 0.055 | −0.165 to 0.274 | −0.027 | −0.063 to 0.008 |
Regular smoker ≥200 cigarette-years | −0.319 | −0.497 to − 0.142 | −0.096 | −0.275 to 0.084 | −0.072 | −0.101 to − 0.043 |
Per 100 cigarette-years | −0.069 | −0.099 to − 0.039 | −0.026 | −0.056 to 0.005 | −0.015 | −0.019 to − 0.010 |
Men‡‡ | ||||||
Smoking rate | n=97† | n=97¶ | n=97** | |||
Never-smoker | Reference | Reference | Reference | |||
Regular smoker 1–14 cigarettes/day | −0.030 | −0.470 to 0.410 | −0.049 | −0.446 to 0.348 | −0.003 | −0.069 to 0.063 |
Regular smoker ≥15 cigarettes/day | −0.259 | −0.651 to 0.132 | −0.005 | −0.358 to 0.349 | −0.080 | −0.139 to − 0.021 |
Per 10 cigarettes/day | −0.084 | −0.255 to 0.088 | 0.0008 | −0.153 to 0.155 | −0.026 | −0.052 to 0.0005 |
Cumulative smoking | n=97† | n=97¶ | n=97** | |||
Regular smoker 1–199 cigarette-years | 0.092 | −0.416 to 0.600 | 0.098 | −0.362 to 0.558 | −0.012 | −0.091 to 0.066 |
Regular smoker ≥200 cigarette-years | −0.285 | −0.664 to 0.094 | −0.081 | −0.424 to 0.262 | −0.065 | −0.123 to − 0.007 |
Per 100 cigarette-years | −0.034 | −0.088 to 0.021 | 0.002 | −0.047 to 0.052 | −0.010 | −0.019 to − 0.002 |
Women‡‡ | ||||||
Smoking rate | n=230†‡§ | n=229‡§¶ | n=229‡§** | |||
Never-smoker | Reference | Reference | Reference | |||
Regular smoker 1–14 cigarettes/day | −0.151 | −0.335 to 0.033 | −0.011 | −0.217 to 0.195 | −0.037 | −0.070 to − 0.004 |
Regular smoker ≥15 cigarettes/day | −0.181 | −0.407 to 0.046 | 0.020 | −0.234 to 0.273 | −0.063 | −0.104 to − 0.022 |
Per 10 cigarettes/day | −0.133 | −0.239 to − 0.027 | −0.009 | −0.128 to 0.110 | −0.040 | −0.059 to − 0.021 |
Cumulative smoking | n=228†§†† | n=227§¶†† | n=227§**†† | |||
Regular smoker 1–199 cigarette-years | −0.138 | −0.355 to 0.078 | 0.007 | −0.234 to 0.249 | −0.036 | −0.074 to 0.003 |
Regular smoker ≥200 cigarette-years | −0.187 | −0.381 to 0.007 | 0.015 | −0.201 to 0.232 | −0.062 | −0.097 to − 0.027 |
Per 100 cigarette-years | −0.058 | −0.099 to − 0.017 | −0.015 | −0.061 to 0.031 | −0.016 | −0.023 to − 0.008 |
*Adjusted for sex, age, height, education, past 12 months secondhand smoking (SHS), lifetime cumulative SHS and mould odour.
†FEV1 is available for 331 regularly smoking or never-smoking participants (97 men and 234 women).
‡Smoking rate is missing for 2 women for daily smoking.
§Height is missing for 2 women.
¶FVC is available for 330 regularly smoking or never-smoking participants (97 men and 233 women).
**FEV1:FVC is available for 330 regularly smoking or never-smoking participants (97 men and 233 women).
††Cigarette-years is missing for 4 women.
‡‡Adjusted for age, height, education, past 12 months SHS, lifetime cumulative SHS and mould odour.