| 6MWD | 6-Minute Walk Distance |
| 6MWT | 6-Minute Walk Test |
| AAT | Alpha-1 Antitrypsin |
| ABG | Arterial Blood Gas |
| ACT | Airway Clearance Techniques |
| ADO | Age, Dyspnoea score and Obstruction |
| BODE | Body mass index, degree of Obstruction measured by FEV₁, Dyspnoea, & Exercise capacity |
| CAT | COPD Assessment Test |
| CBT | Cognitive Behaviour Therapy |
| CCQ | Clinical COPD Questionnaire |
| CI | Confidence Interval |
| CrI | Credible Interval |
| CPAP | Continuous Positive Airway Pressure |
| CRQ | Chronic Respiratory Disease Questionnaire |
| CVD | Cardiovascular Disease |
| DLCO | Diffusing Capacity of Lung for Carbon Monoxide test |
| DPI | Dry Powder Inhaler |
| EPC | Extended Primary Care |
| ERV | Expiratory Reserve Volume |
| FeNO | Exhaled nitric oxide fraction |
| FEV₁ | Forced Expiratory Volume in 1 Second |
| FFM | Fat Free Mass |
| FRC | Functional Residual Capacity |
| FVC | Forced Vital Capacity |
| HADS | Hospital Anxiety and Depression Scale |
| HR | Hazard ratio |
| HRCT | High Resolution Computed Tomography |
| HRQoL | Health-related quality of life |
| IC | Inspiratory Capacity |
| IPAP | Inspiratory Positive Airway Pressure |
| ISWD | Incremental Shuttle Walk Distance |
| LOS | Length of Stay |
| LTOT | Long-Term Oxygen Therapy |
| MCID | Minimum Clinically Important Difference |
| MDI | Metered Dose Inhaler |
| mMRC | Modified Medical Research Council Dyspnoea Scale |
| NHF | Nasal High Flow |
| NIV | Non-Invasive Ventilation |
| NNH | Number Needed to Harm |
| NNT | Number Needed to Treat |
| NNTB | Number needed to treat for an additional beneficial outcome |
| OR | Odds Ratio |
| OSA | Obstructive Sleep Apnoea |
| PBS | Pharmaceutical Benefits Scheme |
| PEP | Positive Expiratory Pressure |
| PHT | Pulmonary Hypertension |
| pMDI | Pressurised Metered Dose Inhaler |
| RCT | Randomised Controlled Trial |
| RR | Relative Risk/ Rate Ratio |
| SD | Standard Deviation |
| SES | Socioeconomic Status |
| SGRQ | St George’s Respiratory Questionnaire |
| SGRQ-C | St George’s Respiratory Questionnaire-COPD |
| TB | Tuberculosis |
| TLC | Total Lung Capacity |
| WMD | Weighted Mean Difference |
