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目的:采用系统评价的方法分析维生素D缺乏症(Vitamin D deficiency，VDD)与儿童脓毒症及脓毒性休克之间的关系，探讨不同VDD对其发生及预后的影响。方法:应用Medline、EBSCO host、Web of Science数据库以及中国知网和万方数据库，系统性检索维生素D与危重症儿童的观察性队列研究，根据Newcastle-Ottawa scale文献质量评估标准评估文献质量，采用统一的脓毒症及脓毒性休克的诊断标准和临床指标，分别提取25(OH)-D浓度及与脓毒性休克的相关数据，综合分析两种不同VDD与儿童脓毒症及脓毒性休克的关系。结果:共检索到658篇文献，最终纳入文献8篇，包括1 367例危重症患儿。系统评价结果显示，重度VDD患儿发生脓毒症及脓毒性休克的风险性明显上升，合并n RR值分别为1.71(95%n CI1.11～2.63，n P＝0.01)和2.05(95%n CI1.35～3.10，n P<0.001)，显著高于VDD患儿相应的发病率；此外与非重度VDD患儿相比，重度VDD的cv-SOFA评分明显增加(n RR0.68，95%n CI0.45～0.91，n P<0.001)。VDD与重度VDD患儿均未在脓毒症病死率及血管活性药物维持时间方面表现出统计学差异。n 结论:在危重症儿童中，重度VDD与脓毒症及脓毒性休克的发生密切相关，而且合并重度VDD可使脓毒症患儿的cv-SOFA评分显著上升，明显优于VDD标准。“,”Objective:To evaluate the relationship of vitamin D deficiency(VDD) between sepsis and septic shock among critical ill children, and investigate the influence of VDD on etiology and prognosis of sepsis.Methods:The observational cohort studies, involving vitamin D and critically ill children, were searched in Medline, Web of Science, EBSCO host and China National Knowledge Infrastructure, Wanfang Data Knowledge Service Platform.The quality assessment was conducted on the basis of the Newcastle-Ottawa Quality Assessment Scale.Consistent definitions of sepsis and septic shock were applied and standardized data were obtained following the study design.We retrieved the clinical outcomes related to septic shock and serum 25-hydroxyvitamin Dn 3concentrations and made a meta-analysis for the relation between VDD and clinical outcomes at two cut-offs.n Results:In the analysis of collected data including severe VDD as a risk factor for incidence of sepsis and septic shock, the pooled n RRwas 1.71(95%n CI1.11 to 2.63, n P=0.01) and 2.05(95%n CI1.35 to 3.10, n P<0.001) respectively, which were all higher compared with VDD.And severe VDD was also associated with cv-SOFA score(n RR0.68, 95%n CI0.45 to 0.91, n P<0.001). However, no significant differences in mortality or the duration of vasopressor was found at severe VDD or VDD cut-off levels among septic shock patients.n Conclusion:Among pediatric critical illness, severe VDD is more likely related to the incidence for sepsis and septic shock compared with VDD.And comorbidity with severe VDD could increase the cv-SOFA score of septic children.