Multivariable linear regression models for the adjusted correlation of calprotectin with disease severity in the derivation cohort
| Log (calprotectin) | Adjusted for age, sex, smoked pack-years | ||
| Coefficient (95% CI) | P value | Adjusted R2 | |
| DLCO, % predicted | −0.05 (−0.09 to −0.01) | 0.02 | 0.74 |
| CPI | 0.08 (0.03 to 0.12) | 0.01 | 0.85 |
CPI, Composite Physiological Index; DLCO, diffusing capacity for carbon monoxide; R2, coefficient of determination.