| Table 5: Association between exposure to bio-aerosols and changes in the PFT parameters after adjusting for participants’ age, weight, height, duration and severity of smoking using multiple linear regression analysis | |
| Dependent variable | Regression coefficient β (95% CI) |
| VC | –0.39 (–0.23 to –0.54) |
| FVC | –0.73 (–0.71 to –0.76) |
| FEV1 | –0.67 (–0.64 to –0.70) |
| FEV1/FVC | –0.67 (–0.65 to –0.68) |
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