目的   探讨营养评估及炎症因子水平对非霍奇金淋巴瘤（NHL）患者化学治疗（化疗）后感染及平均住院日的影响。方法   回顾性分析接受R-CHOP治疗的NHL患者95例。通过受试者工作特征（ROC）曲线确定患者主观整体营养评估（PG-SGA）预测患者化疗后感染的界值。将患者分为PG-SGA＜4组与PG-SGA≥4组，比较两组间营养及炎症相关指标的差异。采用单因素与多因素回归分析NHL患者化疗后感染及平均住院日延长的危险因素。结果  ROC曲线显示PG-SGA为3.5时，约登指数最大，预测NHL患者化疗后感染灵敏度为92%，特异度为11.1%。PG-SGA≥4组患者平均年龄、国际预后指数（IPI）及Ann arbor Ⅲ~Ⅳ期比例均高于PG-SGA＜4组（P＜0.05）。与PG-SGA＜4组相比，PG-SGA≥4组患者白介素6（IL-6）及中性粒细胞与淋巴细胞比值（NLR）明显升高，且化疗后感染率及平均住院日≥5 d比例高于对照组（P＜0.05）；与对照组相比，PG-SGA＜4组患者前白蛋白、白蛋白和血红蛋白水平升高（P均＜0.05）。多因素回归分析显示，PG-SGA≥4及合并糖尿病是NHL患者化疗后感染率的独立危险因素（P均＜0.05）。白蛋白低于35 g/L及合并化疗后感染是NHL患者平均住院日延长的独立危险因素（P均＜0.05）。结论   基于PG-SGA的营养评估及炎症因子分析对NHL患者化疗后感染及平均住院日的预测具有临床指导意义。

       Objective  To explore the effects of nutritional assessment and inflammatory factor levels on post-chemotherapy infections and length of hospital stay in patients with non-Hodgkin’s lymphoma（NHL）．Methods  A total of 95 NHL patients treated with the R-CHOP regimen were retrospectively analyzed．The  cut-off  value  of  Patient-Generated  Subjective Global Assessment （PG-SGA） for post-chemotherapy infection in NHL patients was evaluated by Receiver Operating Characteristic（ROC）curves．Patients were categorized into PG-SGA＜4 and PG-SGA≥4 groups and compared for differences of nutritional and inflammation-related factors．Univariate and multivariate logistic regression were used to analyze the risk factors for post-chemotherapy infection and length of hospital stay（LHS）．Results  The ROC curve showed that the Youden index was largest at PG-SGA of 3.5，which predicted post-chemotherapy infection in NHL patients with a sensitivity of 92% and a specificity of 11.1%．The mean age，International Prognostic Index（IPI），and Ann Arbor stage Ⅲ~IV proportion in patients with PG-SGA≥4 were higher compared with the control（P＜0.05）．Patients with PG-SGA≥4 had significantly higher interleukin-6 and neutrophil-to-lymphocyte ratio（NLR），and the infection rate and the proportion of LHS≥5 days after chemotherapy were higher than those in the control group（P＜0.05）．Patients in the PG-SGA＜4 group had significantly higher prealbumin，albumin，and hemoglobin levels compared to the PG-SGA≥4 group（P＜0.05）．Multifactorial logistic regression analysis revealed that PG-SGA≥4 and combined diabetes mellitus were independent risk factors for post-chemotherapy infection rate in NHL patients（both P＜0.05）．Albumin less than 35 g/L and combined post-chemotherapy infection were independent risk factors for prolonged LHS in NHL patients（both P＜0.05）．Conclusions  PG-SGA nutritional assessment and inflammatory factor analysis are clinically instructive in predicting post-chemotherapy infections and LHS in NHL patients．