Risk factors for surgery and postoperative recurrence in Crohn's disease

Resolving Resident Colonic Muscularis Macrophage Diversity and Plasticity During Colitis

BACKGROUND

Immune cell populations in the intestinal muscularis propria during colitis are poorly resolved. Maintaining homeostasis in this niche is critical, highlighted by the poorer prognosis of inflammatory bowel disease associated with muscularis propria inflammation.

METHODS

This study utilizes single-cell RNA sequencing to survey the immune cell populations within the muscularis propria of normal colon and dextran sodium sulfate-induced colitis. Findings are validated by immunohistochemistry, flow cytometry and cell-lineage tracing in vivo, and in vitro assays with muscularis macrophages (MMφ).

RESULTS

In naïve conditions, transcriptional duality is observed in MMφs with 2 major subpopulations: conventional resident Cx3cr1+ MMφs and Lyve1+ MMφs. The Lyve1+ population is phagocytic and expresses several known MMφ markers in mouse and human, confirming their identity as a bona fide MMφ subset. Single-cell transcriptomics indicate that resident MMφs are retained during colitis and exhibit plasticity toward an inflammatory profile. Lyve1+ MMφs, which express anti-inflammatory marker CD163, are absent during colitis, as confirmed by flow cytometry. In contrast, lineage tracing finds that resident Cx3cr1+ MMφs remain during colitis and are not completely replaced by the inflammatory infiltrating monocytes. In vitro studies provide biological evidence of the plasticity of resident Cx3cr1+ MMφs in response to lipopolysaccharide (LPS), mirroring transcriptional observations in vivo of their inflammatory plasticity. Potential markers for colitic MMφs, validated in animal models and in individuals with ulcerative colitis, are identified.

CONCLUSIONS

Our findings contribute to the understanding of the immune system in the muscularis propria niche during colitis by resolving the heterogeneity and origins of colitic MMφs.

Safety and Efficacy of Infusional Perioperative Tacrolimus Therapy in Crohn's Disease Patients Undergoing Intestinal Resection

Introduction

Perioperative optimization of Crohn's disease (CD) patients is mandatory in order to ensure favorable outcomes and limit perioperative morbidity such as anastomosis-related complications. The use of perioperative tacrolimus may offer beneficial inflammatory control and improve postoperative outcome. However, it also may exhibit unwanted effects of immunosuppression on infectious complications and wound healing.

Methods

This is a single-center, retrospective study of CD patients undergoing intestinal resection between 2009 and 2018. Characteristics of CD patients receiving infusional perioperative tacrolimus or not were systematically evaluated and exploratively compared. To investigate the impact of tacrolimus and other predictors on postoperative infectious complications, simple regression with a threshold of p < 0.05 was used. Significant predictors of the simple regression analysis, as well as tacrolimus, were then included into multiple logistic regression.

Results

This analysis included 30 patients (34.88%) having received tacrolimus perioperatively and 56 patients (65.12%) that were not treated with tacrolimus. In median, 1 mg/day of tacrolimus was given intravenously for 11 days. Adverse events occurred in 3 patients (10%). The most common adverse events were headache and paresthesia. Tacrolimus showed no significant correlation to postoperative infectious complications. Furthermore, multiple regression analysis found no significant effect of tacrolimus on postoperative infectious complications when controlling for previously identified confounders.

Conclusion

Administration of tacrolimus showed no negative impact on postoperative infectious complications in the study cohort, indicating safety of perioperative tacrolimus therapy. By describing in detail our study population of patients receiving perioperative tacrolimus, we provide data guiding future prospective studies.

Risk Factors for Recurrence of Crohn's Disease After Ileocecal Resection and Management Strategies

INTRODUCTION

Pediatric patients with ileocecal Crohn's Disease (CD) refractory to medical management frequently require ileocecectomy. However, risk factors for post-operative ileocecal recurrence and appropriate management strategies are poorly defined in the pediatric literature in the biologic era.

METHODS

We queried our institutional database from 1/1/2012-12/31/2022 for patients aged 1-21 who underwent primary ileocecectomy for CD. We analyzed baseline characteristics, operative details, medical management, recurrence patterns, and management patterns.

RESULTS

We identified 208 patients who underwent primary ileocecal resection, of which 66 (23%) demonstrated endoscopic recurrence at 2.1 ± 0.5 years and 28 (13%) developed clinical recurrence at 2.5 ± 0.8 years. Recurrence was at the surgical anastomosis in 43 (21%). Before surgery, 138 (66%) were treated with a biologic, of which 25 (18%) were transitioned to a second line biologic pre-operatively. Requiring a separate intervention for perianal or intestinal disease increased the odds of recurrence on multivariable analysis, as did requiring a second line biologic. Of those with endoscopic recurrence, most [62/66 (94%)] were successfully managed with medical optimization alone. Only four (6.7%) required procedural intervention with two being managed with endoscopic balloon dilation and two requiring repeat resection and re-anastomosis. Median follow up was 2.6 years [IQR 1.2-4.5].

CONCLUSION

Requiring separate interventions for perianal or intestinal disease and demonstrating disease difficult to medically control may increase the risk of recurrent post-operative ileocecal CD. Such patients should be closely surveilled for endoscopic recurrence and may warrant more aggressive medical regimens. Recurrence can typically be managed medically with few patients requiring procedural intervention.

LEVEL OF EVIDENCE

III.

Investigating the impact of steroid dependence on gastrointestinal surgical outcomes from UK Biobank

Although corticosteroids are an important treatment for inflammatory bowel disease (IBD) patients, many subjects develop dependence, leading to serious long-term side effects. We applied causal inference analyses to investigate the length of steroid use on reoperations in IBD patients. We identified subjects in the UK Biobank general practice dataset with at least one major GI surgery and followed them for at least 5 years to evaluate subsequent operations. We defined steroid dependence as at least 12 weeks of use (vs. acute steroid use) prior to baseline surgery. Of the 363 subjects included in our analyses, 163 (45%) were prescribed steroids on or before baseline surgery, and of these (N = 125 of 163, 77%) were dependent. Additional analyses for time-dependent data on prescriptions found a link between prescription length and reoperation. Among UC subjects with acute use, the odds of reoperation were significantly lower (OR: 0.32, 95% CI: 0.0-0.73). Steroid dependence resulted in a delay of reoperation (median 1.2 vs. 2.3 years, P = 0.01). Our findings indicate that long-term steroid use tends to increase the need for reoperation, whereas short-term use may reduce it.

Bright Luminal Sign on High b-Value Diffusion-Weighted Magnetic Resonance Enterography Imaging as a New Biomarker to Predict Fibrotic Strictures in Crohn's Disease Patients: A Retrospective Preliminary Study

A retrospective analysis was conducted to investigate how a bright luminal sign on high b-value diffusion-weighted imaging (DWI) could be considered as a new biomarker for identifying fibrotic strictures in Crohn's disease (CD). Fibrotic strictures, due to excessive deposition of extracellular matrix following chronic inflammatory processes, can be difficult to distinguish from inflammatory strictures using endoscopy. This study was performed on 65 patients with CD who underwent MRE, and among them 32 patients showed the bright luminal sign on high b-value DWI. DWI findings were compared to pre- and post-contrast MRE data. Luminal bright sign performance results were calculated using a confusion matrix, the relationship between categorical variables was assessed by the χ2 test of independence, and the Kruskal-Wallis test (ANOVA) was used for the assessment of statistical significance of differences between groups. The results indicated a high sensitivity (90%) and specificity (85%) of the bright luminal sign for fibro-stenotic CD and a significant correlation between DWI luminal brightness and markers such as the homogeneous enhancement pattern (p < 0.001), increase in enhancement percentage from 70 s to 7 min after gadolinium injection (p < 0.001), and submucosal fat penetration (p = 0.05). These findings indicate that DWI hyperintensity can be considered as a good non-invasive indicator for the detection of severe intestinal fibrosis and may provide an efficient and accurate method for assessing fibrotic strictures. This new non-invasive biomarker could allow an early diagnosis of fibrotic stricture, delaying the onset of complications and subsequent surgery. Moreover, further evaluations through larger prospective trials with histopathological correlation are needed to confirm these results and completely determine the clinical benefits of DWI in treating CD.

The Effect of Colesevelam on the Microbiome in Postoperative Crohn's Disease

BACKGROUND

While surgery plays a pivotal role in the management of ileal Crohn's disease, the risk of endoscopic recurrence following an ileocaecal resection can be greater than 65% within 12 months of surgery. More than 90% of patients with Crohn's disease have a concomitant diagnosis of bile acid diarrhea following an ileal resection. This pilot study aimed to assess whether the use of bile acid sequestrants in patients with Crohn's disease who have undergone a primary terminal ileal resection with concomitant bile acid diarrhea can alter the microbiome and prevent disease recurrence.

METHODS

Patients with Crohn's disease who underwent a primary terminal ileal resection and had symptoms of diarrhea within 1-3 months of surgery underwent 75SeHCAT testing for bile acid diarrhea. If positive (75SeHCAT ≤ 15%), patients were treated with colesevelam and stool samples were collected at 4 weeks, 8 weeks, and 6-12 months posttreatment. If negative (75SeHCAT > 15%), treatment was not given and were reviewed in the clinic as per local guidelines. All patients underwent a 6-12 month postoperative colonoscopy where further stool samples and mucosal biopsies were taken. Disease activity was established using the endoscopic Rutgeert's score, with disease remission defined as Rutgeert's score

RESULTS

A total of 14 patients who completed the study, 10 of whom had a 75SeHCAT positive diagnosis of bile acid diarrhea and were started on treatment with colesevelam. Four patients did not require treatment as 3 were asymptomatic and 1 had a negative 75SeHCAT scan. Three of the fourteen patients had disease recurrence at their 6-12 month postoperative colonoscopy assessment, of which 1 patient was taking colesevelam and 2 patients were not taking colesevelam. A total of 44 fecal samples and 44 mucosal biopsies underwent 16S ribosomal RNA gene analysis to assess α/β-diversity and microbial composition. In the colesevelam treated patients there was no significant difference in α/β-diversity pre- and posttreatment. Pretreatment, the 3 most abundant bacterial classes in all patients were Bacteroidia, Clostridia, and Gammaproteobacteria. Following 6-12 months of treatment, out of the 9 patients on colesevelam, 5/9 (55.6%) had a reduction in Bacteroidia, 9/9 (100%) had an increase in Clostridia, and 7/9 (77.8%) had a reduction in Gammaproteobacteria. Of the 2 patients not given colesevelam, one showed a reduction in Bacteroidia, increase in Clostridia and a reduction in Gammaproteobacteria.

CONCLUSIONS

This small pilot study demonstrated that patients who were given colesevelam, were more likely to be in disease remission at their 6-12 months colonoscopy review compared with those not treated. Furthermore, treatment with colesevelam may have a role in altering the microbiome to help maintain remission states in postoperative Crohn's disease. Larger mechanistic studies are now needed to confirm these findings and demonstrate statistical significance as well as investigate whether this benefit may be present even in those patients with 75SeHCAT negative disease.

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Key Words

• Crohn’s disease
• bile acid diarrhoea
• bile acid sequestrants
• colesevelam
• microbiome
• terminal ileal resection

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MESH Headings Collapse

Grants

• Bowel and Cancer Research

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Affiliation(s)

Aditi Kumar Department of Gastroenterology, The Royal Wolverhampton NHS Trust, Wolverhampton, UK
Mohammed Nabil Quraishi University of Birmingham Microbiome Treatment Centre, Birmingham, UK Department of Gastroenterology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
Hafid O Al-Hassi Research Institute in Healthcare Science, University of Wolverhampton, Wolverhampton, UK
Mohammed Elasrag Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, UK Aston Medical School, College of Health and Life Sciences, Aston University, Birmingham, UK
Jonathan P Segal Department of Gastroenterology, Royal Melbourne Hospital, Melbourne, VIC, Australia Department of Medicine, University of Melbourne, Parkville, VIC, Australia
Manushri Jain Department of Gastroenterology, The Royal Wolverhampton NHS Trust, Wolverhampton, UK
Helen Steed Department of Gastroenterology, The Royal Wolverhampton NHS Trust, Wolverhampton, UK School of Medicine and Clinical Practice, Faculty of Sciences and Engineering, University of Wolverhampton, Wolverhampton, UK
Jeffrey Butterworth Shrewsbury and Telford Hospital NHS Trust, Shrewsbury, UK
Adam Farmer Division of Gastroenterology & Hepatology, St Louis University Hospital, St Louis, MO, USA
John Mclaughlin Division of Diabetes, Endocrinology and Gastroenterology, Faculty of Biology Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK Department of Gastroenterology, Salford Royal Foundation Trust, Stott Lane, UK
Andrew D Beggs University of Birmingham Microbiome Treatment Centre, Birmingham, UK Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, UK
Matthew J Brookes Department of Gastroenterology, The Royal Wolverhampton NHS Trust, Wolverhampton, UK School of Medicine and Clinical Practice, Faculty of Sciences and Engineering, University of Wolverhampton, Wolverhampton, UK

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Primary surgery versus pharmacotherapy for newly diagnosed ileocecal Crohn's disease: a hospital-based cohort study

BACKGROUND/AIMS

Limited knowledge exists regarding the optimal timing and relative advantages of primary surgery compared to medical treatment in ileocecal Crohn's disease (CD). This study aimed to compare long-term outcomes between medication-based treatment versus surgery in newly diagnosed ileocecal CD patients in an Asian population.

METHODS

Among the 885 patients diagnosed with CD and enrolled in the study site hospital cohort between 1980 and 2013, 93 (10.5%) had ileocecal CD. Patients were categorized into either the surgical or medical remission group based on their initial management strategy that led to remission. The rates of relapse, hospitalization, and surgery after achieving remission were compared using Kaplan-Meier curves.

RESULTS

The numbers of patients assigned to surgical and medical remission groups were 15 (17.0%) and 73 (83.0%), respectively. The surgical remission group exhibited a lower relapse rate and longer maintenance of remission (10.7 vs. 3.7 yr; p = 0.017) during a median follow-up of 6.6 years. Hospitalization after the first remission tended to be lower in the surgical remission group (p = 0.054). No cases required repeated intestinal resection after the initial surgical remission, whereas a 23% surgery rate was reported at 5 years after initial medical treatment (p = 0.037). In the multivariable analysis, the initial medication-based treatment was significantly associated with relapse (hazard ratio = 3.23, p = 0.039).

CONCLUSION

In selected cases of localized ileocecal CD, ileocolic resection might be a favorable alternative to medication- based treatment, as it demonstrates a lower relapse rate and longer maintenance of remission.

Combined Advanced Targeted Therapy in Inflammatory Bowel Diseases: An Extensive Update

This article discusses the rationale for and the current data on the efficacy and safety of combined advanced targeted therapy (CATT) for the treatment of moderate-to-severe inflammatory bowel disease.

Outcomes after right-sided colon surgery in Crohn's disease versus cancer

BACKGROUND

Surgery for Crohn's disease (CD) is considered to have more complications due to the underlying inflammation, immunosuppression, and malnutrition. We sought to study the outcomes of right-sided colonic resection in patients with CD and patients with cancer at a high-volume tertiary center utilizing a standardized perioperative protocol.

METHODS

This is a retrospective study of outcomes for all patients with CD or patients undergoing ileocolic resection or right hemicolectomy with ileocolic anastomosis at a single institution from 2013 to 2022. Patients were excluded if they simultaneously underwent another procedure or ostomy creation. Data were analyzed using Wilcoxon rank-sum and chi-squared tests for univariate analyses, and logistic and linear regressions for multivariate analyses.

RESULTS

In total 141 patients with CD and 589 patients with cancer were included. Patients with CD were significantly younger with lower body mass index and less likely to have comorbidities, including diabetes and hypertension. Patients with CD were less likely to have a smoking history or prior abdominal surgery, but more likely to be on steroids. Both groups had similar rates of laparoscopy, intraoperative complications, and blood loss. Despite the preoperative and intraoperative differences, both patients with CD and patients with cancer had similar lengths of stay (LOS), readmission, reoperation, and mortality rates. None of the surgical outcomes differed significantly between the two groups. On multivariate analysis, CD diagnosis was not associated with reoperation, readmission, mortality, or LOS while controlling for other characteristics.

CONCLUSIONS

With the use of standardized perioperative protocols, surgery for CD at a high-volume center with expertise in CD can be performed with comparable results to other indications like cancer.

Azathioprine Plus Exclusive Enteral Nutrition Versus Azathioprine Monotherapy for the Prevention of Postoperative Recurrence in Patients with Crohn's Disease: An Open-Label, Single-Centre, Randomized Controlled Trial

BACKGROUND

Azathioprine [AZA] effectively prevents postoperative endoscopic recurrence [ER] in Crohn's disease [CD]. However, the efficacy of AZA emerges after 3 months. Exclusive enteral nutrition [EEN] can maintain remission in CD. The present trial investigates whether AZA plus postoperative 3-month EEN is superior to AZA alone in preventing ER of CD.

METHODS

In total, 84 high-risk CD patients undergoing intestinal resection received AZA alone or AZA plus 3 months of EEN [AZA + EEN] postoperatively. The primary endpoint was the rate of ER at 12 months. Secondary endpoints included the rate of ER at 3 months, clinical recurrence [CR], CD activity index [CDAI] scores, faecal calprotectin [FC], and C-reactive protein [CRP]. Quality of life was assessed using Short Form-36 [SF-36] and the Inflammatory Bowel Disease Questionnaire [IBDQ].

RESULTS

Patients in the AZA + EEN group exhibited significantly lower rates of ER compared to the AZA group at both 12 months (33.3% [13/39] vs 63.2% [24/38], P = 0.009) and 3 months (8.6% [3/35] vs 28.1% [9/32], P = 0.037) post-surgery. The rates of CR between the two groups at 3 and 12 months were similar. CDAI scores, FC, albumin level, and CRP were all comparable between the two groups. Quality of life was significantly higher in the AZA group than in the AZA + EEN group at 3 months but became comparable from 5 to 12 months postoperatively.

CONCLUSION

In high-risk CD patients, combining AZA with postoperative 3-month EEN reduces 1-year ER but may temporarily impact quality of life. Further large-scale, long-term studies are warranted.

TRIAL NUMBER

NCT05214430.

Ginkgetin improved experimental colitis by inhibiting intestinal epithelial cell apoptosis through EGFR/PI3K/AKT signaling

Excessive apoptosis of intestinal epithelial cells leads to intestinal barrier dysfunction, which is not only one of the pathological features of inflammatory bowel disease (IBD) but also a therapeutic target. A natural plant extract, Ginkgetin (GK), has been reported to have anti-apoptotic activity, but its role in IBD is unknown. This study aimed to explore whether GK has anti-colitis effects and related mechanisms. An experimental colitis model induced by dextran sulfate sodium (DSS) was established, and GK was found to relieve colitis in DSS-induced mice as evidenced by improvements in weight loss, colon shortening, Disease Activity Index (DAI), macroscopic and tissue scores, and proinflammatory mediators. In addition, in DSS mice and TNF-α-induced colonic organoids, GK protected the intestinal barrier and inhibited intestinal epithelial cell apoptosis, by improving permeability and inhibiting the number of apoptotic cells and the expression of key apoptotic regulators (cleaved caspase 3, Bax and Bcl-2). The underlying mechanism of GK's protective effect was explored by bioinformatics, rescue experiments and molecular docking, and it was found that GK might directly target and activate EGFR, thereby interfering with PI3K/AKT signaling to inhibit apoptosis of intestinal epithelial cells in vivo and in vitro. In conclusion, GK inhibited intestinal epithelial apoptosis in mice with experimental colitis, at least in part, by activating EGFR and interfering with PI3K/AKT activation, explaining the underlying mechanism for ameliorating colitis, which may provide new options for the treatment of IBD.

Surgery for inflammatory bowel disease in Spain: How are we doing? Initial results of a nationwide prospective registry

INTRODUCTION

Inflammatory bowel disease (IBD), which includes Crohn's disease (CD) and ulcerative colitis (UC), requires a multidisciplinary approach, and surgery is commonly needed. The aim of this study was to evaluate the types of surgery performed in these patients in a nationwide study by hospital type, global postoperative complications, and quality of life after surgery.

METHODS

A prospective, multicenter, national observational study was designed to collect the results of surgical treatment of IBD in Spain. Demographic characteristics, medical-surgical treatments, postoperative complications and quality of life were recorded with a one-year follow-up. Data were validated and entered by a surgeon from each institution.

RESULTS

A total of 1134 patients (77 centers) were included: 888 CD, 229 UC, and 17 indeterminate colitis. 1169 surgeries were recorded: 882 abdominal and 287 perianal. Before surgery, 81.6% of the patients were evaluated by a multidisciplinary committee, and the mean preoperative waiting time for elective surgery was 2.09 ± 2 meses (P > .05). Overall morbidity after one year of follow-up was 16%, and the major complication rate was 36.4%. Significant differences were observed among centers in complex CD surgeries. Overall quality of life improved after surgery.

CONCLUSIONS

There is heterogeneity in the surgical treatment of IBD among Spanish centers. Differences were observed in patients with highly complex surgeries. Overall quality of life improved with surgical treatment.

Global geoepidemiology of gastrointestinal surgery rates in Crohn's disease

BACKGROUND

Data regarding the worldwide gastrointestinal surgery rates in patients with Crohn's disease (CD) remains limited.

AIM

To systematically review the global variation in the rates of surgery in CD.

METHODS

A comprehensive search analysis was performed using multiple electronic databases from inception through July 1, 2020, to identify all full text, randomized controlled trials and cohort studies pertaining to gastrointestinal surgery rates in adult patients with CD. Outcomes included continent based demographic data, CD surgery rates over time, as well as the geoepidemiologic variation in CD surgery rates. Statistical analyses were conducted using R.

RESULTS

Twenty-three studies spanning four continents were included. The median proportion of persons with CD who underwent gastrointestinal surgery in studies from North America, Europe, Asia, and Oceania were 30% (range: 1.7%-62.0%), 40% (range: 0.6%-74.0%), 17% (range: 16.0%-43.0%), and 38% respectively. No clear association was found regarding the proportion of patients undergoing gastrointestinal surgery over time in North America (R 2 = 0.035) and Europe (R 2 = 0.100). A moderate, negative association was seen regarding the proportion of patients undergoing gastrointestinal surgery over time (R 2 = 0.520) in Asia.

CONCLUSION

There appears to be significant inter-continental variation regarding surgery rates in CD. Homogenous evidence-based guidelines accounting for the geographic differences in managing patients with CD is prudent. Moreover, as a paucity of data on surgery rates in CD exists outside the North American and European continents, future studies, particularly in less studied locales, are warranted.

Risk factors for endoscopic postoperative recurrence in patients with Crohn's Disease: a protocol for systematic review and meta-analysis

BACKGROUND

Crohn's disease (CD) is a chronic condition characterized by a high recurrence rate after surgery, which seriously affects the quality of life of patients. Many studies have explored the risk factors for the recurrence of CD after surgery, there is a lack of meta-analysis focusing on endoscopic postoperative recurrence (ePOR) as a clinical outcome. Therefore, this paper aims to identify the risk factors for ePOR in CD patients through systematic review and meta-analysis.

METHODS

PubMed, Embase, Cochrane Library, and Web of Science databases were searched for related literature from inception to 17th October 2023. Two researchers independently screened the literature and extracted information. Data analysis was performed using Stata18.0.

RESULTS

Twenty-three papers were included, with 5 case-control studies and 18 cohort studies. The National Institutes of Health quality assessment tool rated 17 studies as good and 6 studies as fair. The sample size of the 23 studies ranged from 40 to 346, and the number of patients with ePOR ranged from 23 to 169. The results of multivariate meta-analysis showed that smoking [OR = 2.06, 95% CI (1.65, 2.57), P = 0.0001], previous ileocolonic resection [OR = 1.71, 95% CI (1.23, 2.38), P = 0.002], disease localization at ileocolic resection [OR = 2.68, 95% CI (1.38, 5.22), P = 0.004], perianal disease [OR = 1.47, 95% CI (1.07, 2.03), P = 0.017], and anastomotic scattered ulcer [OR = 3.39, 95% CI (1.83, 6.28), P = 0.001] were risk factors for ePOR in CD patients. Postoperative prophylactic medication [OR = 0.53, 95% CI (0.38,0.75), P = 0.0001] was a protective factor for ePOR in CD patients.

CONCLUSIONS

This systematic review identified multiple factors for ePOR in CD patients, as well as a protective factor. However, the number of articles included was limited. More high-quality clinical studies are required to further validate the conclusions.

TRIAL REGISTRATION

This study was registered in the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42023483671).