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目的:评价英夫利西单抗(IFX)治疗儿童克罗恩病(CD)的疗效及安全性。方法:回顾性分析2014年12月至2019年12月首都医科大学附属北京儿童医院30例经传统药物、肠内营养治疗后未能完全缓解或对药物不耐受的活动性CD患儿应用IFX治疗的疗效，评估儿童克罗恩病活动指数(PCDAI)、血生化指标、黏膜愈合情况、营养状况及不良反应等。结果:共纳入30例处于活动期的CD患儿，其中男18例，女12例；年龄(8.63±4.76)岁。剔除3例注射未满3次的患儿、1例失访患儿，26例患儿纳入疗效研究，IFX治疗第14周临床缓解率和应答率分别为61.5%和84.6%，21例患儿第30周临床缓解率和应答率分别为71.4%和85.7%，15例患儿第54周临床缓解率和应答率分别为86.7%和93.3%。使用IFX诱导治疗第14周，与治疗前比较，患儿PCDAI评分[(9.56±8.05)分比(29.02±10.86)分]显著下降(n t＝7.339，n P<0.05)，红细胞沉降率[(15.54±10.26) mm/1 h比(33.77±21.30) mm/1 h] 、C反应蛋白[(4.79±12.94) mg/L比(16.33±23.43) mg/L]均明显下降，差异均有统计学意义(n t＝3.932、1.993，均n P<0.05)；血红蛋白[(126.27±16.51) g/L比(110.58±16.45) g/L]、红细胞比容[(37.03±3.95)%比(33.52±4.32)%]、白蛋白水平[(42.30±3.03) g/L比(37.13±5.68) g/L]均显著升高，差异均有统计学意义(n t＝-3.398、-3.060、-4.009，均n P0.05)。n 结论:IFX在控制活动性CD患儿炎症反应、诱导临床缓解等方面具有良好疗效。“,”Objective:To evaluate the clinical efficacy and safety of Infliximab (IFX) in pediatric Crohn′s disease (CD).Methods:The efficacy of IFX therapy in 30 patients suffering from active CD who were not completely improved with traditional medicine and enteral nutrition or had intolerance to the medicine in Beijing Children′s Hospital Affiliated to Capital Medical University from December 2014 to December 2019 were retrospectively analyzed.Pediatric Crohn′s Disease Activity Index (PCDAI), blood biochemistry indices, mucosal healing, nutritional status, and adverse reactions were compared and evaluated.Results:Thirty active CD cases, with 18 males and 12 females, were enrolled, and the average age was (8.63±4.76) years old.Three cases who didn′t complete 3 times of IFX injection and 1 case who lost to be followed up were excluded.A total of 26 cases of CD in active period were enrolled in this study on efficacy.The clinical remission and response rate of 26 cases were 61.5% and 84.6%, respectively, at 14-week of IFX therapy.The clinical remission and response rate of 21 cases were 71.4% and 85.7%, respectively, at 30-week.The clinical remission and response rate of 15 cases were 86.7% and 93.3%, respectively, at 54-week.At week 14n th, PCDAI score [(9.56±8.05) scores n vs.(29.02±10.86) scores] decreased compared with before treatment (n t=7.339, n P<0.05). The levels of erythrocyte sedimentation rate [(15.54±10.26) mm/1 hn vs.(33.77±21.30) mm/1 h] and C-reactive protein [(4.79±12.94 ) mg/L n vs.(16.33±23.43) mg/L] were obviously decreased, and the hemoglobin [(126.27±16.51) g/L n vs.(110.58±16.45) g/L], hematocrit [(37.03±3.95)% n vs.(33.52±4.32)%], and albumin levels [(42.30±3.03) g/L n vs.(37.13±5.68) g/L] were remarkably increased compared with those before treatment (n t=3.932, 1.993, -3.398, -3.060, -4.009, all n P0.05).n Conclusions:IFX therapy had good clinical efficacy in controlling inflammatorys and inducing clinical remission in pediatric CD.