Journal impact factors for 2004: respiratory journals
| American Journal of Respiratory and Critical Care Medicine | 8.123 |
| Thorax | 5.040 |
| American Journal of Respiratory Cell and Molecular Biology | 4.175 |
| American Journal of Physiology - Lung Cellular and Molecular Pathology | 4.051 |
| Respiratory Research | 4.028 |
| Journal of Thoracic and Cardiovascular Surgery | 3.263 |
| Chest | 3.118 |
| European Respiratory Journal | 3.096 |
| Journal of Heart and Lung Transplantation | 2.813 |
| Respiratory Medicine | 1.511 |