| BMI | Body Mass Index |
| VC | Vital Capacity |
| FEV1 | Forced Expiratory Volume in 1 s |
| FVC | Forced Vital Capacity |
| PEF | Peak Expiratory Flow |
| FEF50 | Forced Expiratory Flow at 50% of FVC |
| FEF25–75% | Forced Expiratory Flow between 25% and 75% of FVC |
| MEF50 | Maximal Expiratory Flow at 50% of FVC (equivalent to FEF50) |
| ERS | European Respiratory Society |
| ATS | American Thoracic Society |
| Tlco | Diffusion Capacity for Carbon Monoxide (transfer factor) |
| SPSS | Statistical Package for Social Sciences |
| WHO | World Health Organization |
| IOTF | International Obesity Task Force |
| FRC | Functional Residual Capacity |
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