Table 4.

Median levels of serum cytokines according to progression of CWP

Values are presented as median (mean rank). ILO classification 0/0 or 0/1

CWP: coal workers' pneumoconiosis, NP: without progression, P: with progression, IL: interleukin, TNF-α: tumor necrosis factor-alpha, BMI: body mass index, FVC: forced vital capacity, FEV₁: forced expiratory volume in on second.

^*Calculated by Mann-Withney U test.

^†Calculated from a multiple logistic regression model with serum level of each cytokines, adjusted for age, BMI, exposure period, smoking status, and pulmonary function (%FVC predicted, %FEV₁ predicted, and %FEV₁/FVC ratio).