Decreased ratios of circulating CD4 ( + ) / CD8 ( + ) T lymphocytes ( 1.47 0.28 vs 2.13 0.26 ; 1.39 0.32 vs 2.21 0.24 ; P < 0.05 ) and Treg percentage values ( 2.79 1.24 vs 4.26 1.04 ; 2.46 0.98 vs 4.30 1.12 ; P < 0.05 ) were observed after surgery in both groups .