a decreasing trendP < 0.05
For patients with Hb levels over 10 g/dL, 4 patients received a blood transfusion due to a poor mental state, although the Treg frequencies of the transfusion and nontransfusion groups showed a decreasing trend between 48 h and 7 days after surgery ( P < 0.05, nontransfusion group; P < 0.05, transfusion group), but the degree of change in the two groups of Tregs showed no significant difference ( P = 0.543).