Parameters Significant correlation
Total HRCP score FVC, FEV1, FEV1/FVC, FEF 25-75, FEF50
DLCO No
DLCO/VA ILST
FVC Total score
FEV1 BL, CON, Nodule, Total score
Occupational working time BL, CON, Nodule
Age DLCO/VA, FVC, FEV1, BL, GGV, CON, Nodule
FVC: Forced vital capacity, FEV1: Forced expiratory volume in 1 second, FEV1/FVC: Forced expiration rate, PEF: Peak expiratory flow, FEF: Maximal flow at 25-75 percent expired vital capacity. *Smoke-independent
Table 4: Significant correlation between the operating parameters*.