BTLA/CD24 B expression of the peripheral blood was positively correlated with SOD , TAOC , IL-4 , IL-10 , GH , RP , BP , SF , RE , MH , VT ( r = 0.358 , 0.352 , 0.372 , 0.436 , 0.435 , 0.326 , 0.352 , 0.345 , 0.326 , 0.343 , 0.332 , respectively , P < 0.05 , P < 0.01 ) , while it was negative correlated with ROS , RNS , MDA , ESR , Hs-CRP , VAS , BASDAI , and BASFI ( r = -0.447 , -0.336 , -0.405 , -0.395 , -0.358 , -0.436 , -0.338 , -0.425 , respectively , P < 0.05 , P < 0.01 ) .