GOLD stage classification of COPD | |||
---|---|---|---|
Study parameters | GOLD stage II coefficient (r) | GOLD stage III coefficient (r) | GOLD stage IV coefficient (r) |
Superoxide dismutase (U/mg protein) | 0.20 | 0.00 | -0.21 |
Catalase (U/mg protein) | -0.09 | -0.21 | 0.00 |
Glutathione s transferase (U/mg protein) | -0.73** | 0.09 | 0.10 |
Glutathione peroxidase (U/mg protein) | 0.24 | 0.02 | -0.11 |
Glutathione reductase (U/mg protein) | -0.47* | -0.31* | -0.24¥ |
Total antioxidant status (μM Fe2+/l) | -0.07 | -0.38* | 0.20 |