2 Surface area, mean linear intercept of all alveolar spaces(MLI) and volume of human lung samples
| Characteristic | Normal | Emphysema | p-value |
| Surface area µm2 | 182.0±29.8 | 88.5±44.8 | 0.0003 |
| Volume fraction | 0.275±0.095 | 0.17±0.08 | 0.051 |
| MLI µm | 0.011±0.002 | 0.03±0.01 | 0.012 |
Data presented as means±sd. Groups were compared using the unpaired t-test.