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目的:探讨氢核磁共振(n 1H-NMR)技术在维生素A缺乏(VAD)早期筛查中的应用价值。n 方法:2019年1月至6月在遵义地区收集40例确诊VAD<1岁留守儿童为VAD组，另选取40例健康儿童为健康对照组，采集2组儿童尿液，测定n 1H-NMR波谱。应用代谢组学技术，结合多变量统计分析比较2组代谢产物，筛选出VAD患儿差异性代谢产物。n 结果:健康对照组血清视黄醇水平[(1.35±0.18) μmol/L]与VAD组[(0.56±0.10) μmol/L]比较，差异有统计学意义(n t＝23.93，n P0.602，均n P0.602，均n P<0.05)。n 结论:VAD患儿与健康儿童比较，尿液代谢产物存在差异，差异代谢产物与肠道微生态平衡、消化系统疾病、呼吸系统疾病、免疫相关疾病及能量代谢、生长发育密切相关，尿液n 1H-NMR代谢组学分析在VAD早期筛查中具有潜在应用价值。n “,”Objective:Explore the hydrogen-nuclear magnetic resonance (n 1H-NMR) application potential of metabolomics in early screening of vitamin A deficiency(VAD).n Methods:From January to June 2019, 40 cases of left-behind children with confirmed VAD <1 year old were enrolled in Zunyi area as VAD group, and 40 healthy children were selected as healthy control group.Urine from the 2 groups of children was collected and n 1H-NMR spectrum was measured.By combining metabonomics technology and multivariate statistical analysis, the 2 groups of metabolites were compared, and the differential metabolites of children with VAD were screened out.n Results:Compared with VAD group [(0.56±0.10)μmol/L], the difference in the serum retinol concentration of healthy control group [(1.35±0.18)μmol/L] was statistically significant (n t=23.93, n P0.602, alln P0.602, all P<0.05).n Conclusions:Compared with healthy children, children with VAD have differences in urine Metabolites.Differential metabolites are closely correlated with intestinal microecological ba-lance, digestive system diseases, respiratory system diseases, immune-related diseases, energy metabolism, growth and development.Urine n 1H-NMR metabolomics analysis has potential application value in the early screening of VAD.n