Relation between Petco2 values and severity of lung disease
| Severe (n = 12) | Mild-moderate (n = 8) | |||||
|---|---|---|---|---|---|---|
| Mean (SD) | 95% CI | p Value | Mean (SD) | 95% CI | p Value | |
| All CO2 values in kPa. Severe lung disease, PAo2/Pao2 ratio <0.3; mild-moderate lung disease, PAo2/Pao2 ratio ⩾0.3. | ||||||
| P(a-Et)co2 | 1.21 (0.76) | 0.87 to 1.88 | <0.001 | 0.99 (1.16) | −0.61 to 1.37 | 0.013 |