CRP and interstitial lung disease: Using univariate logistic regression, we found that ILD occupying more than 10% of the lung field (OR = 7.22; 95% CI = 1.43–40.8; p = 0.017) and CRP levels at the initiation of RT (OR = 35.3; 95% CI = 1.38–1241; p = 0.032) were significantly associated with the development of AERP (Table 4).