实用医学杂志 ›› 2026, Vol. 42 ›› Issue (18): 3315-3322.doi: 10.3969/j.issn.1006-5725.2026.18.009

• 慢性病防治专栏 • 上一篇    

英夫利西单抗治疗儿童克罗恩患者早期肠道超声参数与54周内镜缓解的相关性

邓星1,2, 左茂益1,2, 潘桂贤1,2, 杨秋萍1,2, 蔡尧1,2, 李思涛1,2()   

  1. 1. 中山大学附属第六医院儿科 (广东 广州 510655 )
    2. 广东省消化系统疾病临床医学研究中心 (广东 广州 510655 )
  • 收稿日期:2026-07-28 修回日期:2026-08-21 接受日期:2026-08-27 出版日期:2026-09-25 发布日期:2026-10-19
  • 通讯作者: 李思涛
  • 基金资助:
    广东省自然科学基金项目(2024A1515010520)

Association of early intestinal ultrasound parameters with endoscopic healing at week 54 in pediatric Crohn′s disease patients treated with infliximab

Xing Deng1,2, Maoyi Zuo1,2, Guixian Pan1,2, Qiuping Yang1,2, Yao Cai1,2, Sitao Li1,2()   

  1. 1. Department of Pediatrics,the Sixth Affiliated Hospital of Sun Yat-sen University,Guangzhou 510655,Guangdong,China
    2. Guangdong Provincial Clinical Research Center for Digestive Diseases,Guangzhou 510655,Guangdong,China
  • Received:2026-07-28 Revised:2026-08-21 Accepted:2026-08-27 Online:2026-09-25 Published:2026-10-19
  • Contact: Sitao Li
  • About author:

    Deng Xing designed the study, collected and analyzed the data, and wrote the article. Zuo Maoyi collected the data and prepared the tables. Pan Guixian and Yang Qiuping performed the data cleaning and statistical analysis and prepared the figures. Cai Yao verified the clinical data and performed quality control. Li Sitao designed the study, revised the article, and reviewed the final manuscript. All authors read and approved the final manuscript as submitted.

摘要:

目的 探讨在首次接受英夫利西单抗(infliximab,IFX)治疗的克罗恩病(Crohn's disease,CD)患儿中,第14周肠道超声(intestinal ultrasound,IUS)参数与54周内镜缓解的相关性。 方法 采用单中心回顾性研究,共纳入2023年1月至2025年7月于中山大学附属第六医院儿科首次接受IFX治疗的CD患儿31例。于基线、第14、54周行IUS检查,记录肠壁厚度(bowel wall thickness,BWT,> 3 mm定义为增厚)、Limberg分级(≥ 2级定义为异常)、肠壁分层(消失定义为异常)及肠周脂肪(增厚定义为异常)。第54周行结肠镜评估,以SES-CD ≤ 2分定义为内镜缓解,以SES-CD > 2分定义为内镜未缓解。比较缓解组与未缓解组各时点超声参数异常的比率,分析第14周BWT及Limberg分级与54周内镜未缓解的相关性,并采用广义估计方程(generalized estimating equations, GEE)分析不同时点超声指标的纵向变化趋势。 结果 第54周时15例(48.4%)达到内镜缓解。基线时两组各项超声异常率差异均无统计学意义(P > 0.05)。第14周时,未缓解组BWT增厚率及Limberg分级异常率均为93.8%(15/16),均显著高于缓解组的40.0%(6/15)(P = 0.002)。第14周BWT增厚预测54周内镜未缓解的敏感度为93.8%(95%CI:69.8% ~ 99.8%),特异度为60.0%(95%CI:32.3% ~ 83.7%),阳性预测值为71.4%(95%CI:47.8% ~ 88.7%),阴性预测值为90.0%(95%CI:55.5% ~ 99.7%)。第14周时BWT与Limberg分级均正常者54周缓解率为90.0%(9/10),任一异常者缓解率仅28.6%(6/21)。GEE显示BWT及Limberg分级的分组主效应显著(均P < 0.05);校正时变ln(CRP + 1)后分组主效应仍显著(OR = 7.93,95%CI:1.56 ~ 40.27,P = 0.013),14周×分组交互项不具有统计学意义(P = 0.370)。肠壁分层消失及肠周脂肪增厚的分组效应及交互项均不显著(P > 0.05)。 结论 在接受IFX治疗的CD患儿中,第14周IUS所示的BWT增厚及Limberg分级异常与54周内镜未缓解具有一定的相关性,阴性预测值较高,且在校正CRP后仍成立。

关键词: 克罗恩病, 儿童, 肠道超声, 英夫利西单抗, 内镜缓解

Abstract:

Objective This study aimed to investigate the association between intestinal ultrasound (IUS) parameters obtained at week 14 and endoscopic healing status at week 54 in pediatric patients with Crohn's disease (CD) undergoing their first course of infliximab (IFX) treatment. Methods This single-center retrospective study enrolled 31 pediatric patients with CD who initiated their first IFX treatment at the Department of Pediatrics of the Sixth Affiliated Hospital of Sun Yat-sen University between January 2023 and July 2025. IUS examinations were conducted at baseline, week 14, and week 54, and the following parameters were documented: bowel wall thickness (BWT, defined as abnormal thickening when exceeding 3 mm), Limberg grade (classified as abnormal when grade ≥ 2), bowel wall stratification (classified as abnormal when stratification is lost), and perienteric fat (classified as abnormal when thickened). Colonoscopy was performed at week 54. Endoscopic healing was defined as a Simple Endoscopic Score for Crohn's Disease (SES-CD) ≤ 2, while non-healing was defined as SES-CD > 2. We compared the proportion of abnormal ultrasound parameters at each time point between the endoscopic healing group and the non-healing group, and calculated the diagnostic performance of week 14 BWT and Limberg grade for predicting endoscopic non-healing at week 54. Generalized estimating equations (GEE) were applied to analyze the longitudinal trends of ultrasound parameters. Results Endoscopic healing was achieved in 15 out of 31 patients (48.4%) at week 54. At baseline, no statistically significant between-group differences were observed in the proportion of patients with abnormal ultrasound parameters (all P > 0.05). At week 14, the rates of BWT thickening and abnormal Limberg grading in the non-healing group were both 93.8% (15/16), which was significantly higher than the 40.0% (6/15) observed in the healing group (P = 0.002). For predicting endoscopic non-healing at week 54, BWT thickening measured at week 14 yielded a sensitivity of 93.8% (95%CI: 69.8% - 99.8%), a specificity of 60.0% (95%CI: 32.3% - 83.7%), a positive predictive value of 71.4% (95%CI: 47.8% - 88.7%), and a negative predictive value of 90.0% (95%CI: 55.5% - 99.7%). Among patients with both normal BWT and normal Limberg grade at week 14, the endoscopic healing rate at week 54 reached 90.0% (9/10), while this rate was only 28.6% (6/21) in patients with at least one abnormal parameter. GEE analysis revealed significant group effects for BWT thickening and abnormal Limberg grade (both P < 0.05). After adjusting for time-varying ln(CRP + 1), the group effect remained statistically significant (OR = 7.93, 95%CI: 1.56 - 40.27, P = 0.013), while the week 14 × group interaction was not statistically significant (P = 0.370). No significant group effects or interaction terms were identified for loss of bowel wall stratification or perienteric fat thickening (all P > 0.05). Conclusions In pediatric patients with CD receiving IFX therapy, elevated bowel wall thickness and abnormal Limberg classification detected via intestinal ultrasound at week 14 were correlated with endoscopic non-healing at week 54. This association exhibited a high negative predictive value, and remained statistically significant after adjustment for C-reactive protein.

Key words: Crohn's disease, children, intestinal ultrasound, infliximab, endoscopic healing

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