Spearman correlation analysis indicated that FEV1 , MWVV , PEF , FEF50 , and FEF75 were positively correlated with SOD , CAT , TAOC , IL-4 , and IL-10 , and were negatively correlated with NF-B p65 , iNOS , NO , ROS , RNS , MDA , IL-13 , TNF - , ESR , and CRP .