Multivariable linear regression models for the adjusted correlation of calprotectin with disease severity in the validation cohort
| Log (calprotectin) | Adjusted for age, sex, smoking status and pirfenidone treatment | ||
| Coefficient (95% CI) | P value | Adjusted R2 | |
| DLCO, % predicted | −0.01 (−0.002 to −0.020) | 0.01 | 0.16 |
| CPI | 0.014 (0.003 to 0.024) | 0.01 | 0.17 |
CPI, Composite Physiological Index; DLCO, diffusing capacity for carbon monoxide; R2, coefficient of determination.