[RESULTS] ( 4 ) Pearson correlation analysis showed , BTLA/CD19 + B expression of the peripheral blood was positively correlated with SOD , CAT , TAOC , IL-4 , IL-10 , GH , RP , BP , and SF ( r = 0.431 , 0.325 , 0.318 , 0.316 , 0.348 , 0.314 , 0.358 , 0.318 , 0.326 , respectively , P < 0.05 , P < 0.01 ) , while it was negative correlated with ROS , MDA , TNF - , IL-1 , ESR , VAS , and BASDAI ( r = -0.342 , -0.368 , -0.334 , -0.354 , -0.324 , -0.372 , -0.342 , respectively , P < 0.05 , P < 0.01 ) .