Basic characteristics of the 17 studies used in our meta-analysis.

CT: chemotherapy; RT: radiotherapy; RCT: radiochemotherapy; ECOG: Eastern Cooperative Oncology group; LDH: lactic dehydrogenase; NR: not reported; No.: number.Basic characteristics of the 17 studies used in our meta-analysis.CT：化疗（chemotherapy）；RT：放疗（radiotherapy）；RCT：放化疗（radiochemotherapy）；ECOG：东部肿瘤协作组（Eastern Cooperative Oncology Group）；LDH：乳酸脱氢酶（lactic dehydrogenase）；NR：未报道（not reported）；No.：例数（number）。本项荟萃分析所纳入的17项研究的基本特征。