Model showing change in respiratory burden score as the outcome variable for the full model and stratified by sex and asthma status*
| Exposure variable | Full model | Sex: male | Sex: female | P value comparing sexes | Asthma: yes | Asthma: no | P value comparing asthma status | |||||
| Unadjusted β (95% CI) | Adjusted β† (95% CI) | Unadjusted β (95% CI) | Adjusted β† (95% CI) | Unadjusted β (95% CI) | Adjusted β† (95% CI) | Unadjusted β (95% CI) | Adjusted β† (95% CI) | Unadjusted β (95% CI) | Adjusted β† (95% CI) | |||
| Change in BMI | 0.05 (0.03 to 0.07) | 0.05 (0.04 to 0.07) | 0.05 (0.03 to 0.08) | 0.06 (0.04 to 0.09) | 0.05 (0.03 to 0.07) | 0.05 (0.03 to 0.07) | 0.57 | 0.13 (0.07 to 0.20) | 0.12 (0.06 to 0.18) | 0.04 (0.02 to 0.05) | 0.05 (0.03 to 0.06) | 0.011 |
| Change in VGDF exposure‡ | 0.07 (0.02 to 0.11) | 0.15 (0.10 to 0.19) | 0.11 (0.05 to 0.17) | 0.18 (0.12 to 0.24) | 0.04 (−0.20 to 0.10) | 0.13 (0.07 to 0.19) | 0.064 | 0.15 (−0.04 to 0.35) | 0.18 (−0.02 to 0.38) | 0.06 (0.01 to 0.10) | 0.15 (0.11 to 0.19) | 0.412 |
Significant findings at p<0.05 shown in bold.
*Regression models for change in respiratory burden score were fit separately for the exposure variables change in BMI and change in VGDF exposure.
†Adjusted for age, sex, education in 2013, smoking in 2013, change in smoking habit, BMI category in 2013, asthma, VGDF exposure in 2013 and respiratory burden score in 2013.
‡Restricted to the employed in the last 12 months in 2013.
BMI, body mass index; VGDF, vapours, gas, dust and fumes.