Number of T cell subsets ( CD@ ( + ) , CD@ ( + ) , CD@ ( + ) , CD@ ( + ) / CD@ ( + ) ) and natural killer ( NK ) cell , procalcitonin ( PCT ) , fasting blood glucose ( FBG ) , fasting insulin ( FINS ) , insulin resistance index ( InHOMA-IR ) calculated by the homeostasis model assessment ( HOMA ) were detected before operation and on days @ and @ after operation and compared between the two groups .