scholarly journals Automatic, computer-aided determination of endoscopic and histological inflammation in patients with mild to moderate ulcerative colitis based on red density

Gut ◽  
2020 ◽  
Vol 69 (10) ◽  
pp. 1778-1786 ◽  
Author(s):  
Peter Bossuyt ◽  
Hiroshi Nakase ◽  
Séverine Vermeire ◽  
Gert de Hertogh ◽  
Tom Eelbode ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Objective Evaluation ◽  
Second Phase ◽  
Endoscopic Images ◽  
Severity Scores ◽  
Computer Based ◽  
Index Of Severity ◽  
Using Data ◽  
Histological Factors

BackgroundThe objective evaluation of endoscopic disease activity is key in ulcerative colitis (UC). A composite of endoscopic and histological factors is the goal in UC treatment. We aimed to develop an operator-independent computer-based tool to determine UC activity based on endoscopic images.MethodsFirst, we built a computer algorithm using data from 29 consecutive patients with UC and 6 healthy controls (construction cohort). The algorithm (red density: RD) was based on the red channel of the red-green-blue pixel values and pattern recognition from endoscopic images. The algorithm was refined in sequential steps to optimise correlation with endoscopic and histological disease activity. In a second phase, the operating properties were tested in patients with UC flares requiring treatment escalation. To validate the algorithm, we tested the correlation between RD score and clinical, endoscopic and histological features in a validation cohort.ResultsWe constructed the algorithm based on the integration of pixel colour data from the redness colour map along with vascular pattern detection. These data were linked with Robarts histological index (RHI) in a multiple regression analysis. In the construction cohort, RD correlated with RHI (r=0.74, p<0.0001), Mayo endoscopic subscores (r=0.76, p<0.0001) and UC Endoscopic Index of Severity scores (r=0.74, p<0.0001). The RD sensitivity to change had a standardised effect size of 1.16. In the validation set, RD correlated with RHI (r=0.65, p=0.00002).ConclusionsRD provides an objective computer-based score that accurately assesses disease activity in UC. In a validation study, RD correlated with endoscopic and histological disease activity.

scholarly journals P233 Evaluating the association between faecal calprotectin and endoscopic outcomes in ulcerative colitis using the HICKORY open-label induction cohort

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S259-S259
Author(s):  
W Reinisch ◽  
B El Azzouzi ◽  
R Li ◽  
S Lacey ◽  
M Daperno ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Clinical Trials ◽  
Disease Activity ◽  
Clinical Remission ◽  
Area Under The Curve ◽  
Percentage Change ◽  
Open Label ◽  
Faecal Calprotectin ◽  
Using Data ◽  
Factor Α

Abstract Background In clinical practice, faecal calprotectin (FC) is used to monitor disease activity in ulcerative colitis (UC); however, there is no consensus on optimal cut-off values of FC for predicting endoscopic outcomes. FC performance has not been extensively assessed in the context of clinical trials using central endoscopy. This study aimed to evaluate the association between FC and endoscopic disease activity and to propose a meaningful cut-off FC value to predict endoscopic outcomes using data from the open-label induction (OLI) cohort of HICKORY (NCT02100696). Methods HICKORY is a Phase 3 study evaluating etrolizumab in anti-tumour necrosis factor α-experienced patients with moderate-to-severe UC. The study included patients who received ≥1 dose of etrolizumab 105 mg subcutaneously every 4 weeks during a 14-week induction period. Percentage change in FC was calculated at week 14. The endoscopic activity was measured by Mayo Clinic score (MCS) endoscopic subscore (ES) using a robust central-reading model. Endoscopic improvement was defined as ES=0/1; clinical remission as MCS ≤2 and no individual subscore &gt;1. FC analysis was performed by Covance® (Bühlman FC ELISA assay). Receiver operator characteristic (ROC) curve analyses were used to calculate cut-off FC values. Results A total of 97 patients (mean age [standard deviation], 41.2 ± 13.4 years) were included in the analysis. Median (interquartile range [IQR]) baseline duration of disease was 6.3 (3.2–12.3) years with a median (IQR) MCS of 9 (8–10). Median (IQR) baseline FC and ES were 254 (156–455) µg/g and 3 (3-3). At week 14, median (IQR) FC percentage change was −13 (−57 to 112). A numerical association between changes in FC level and ES was observed (Table). A cut-off FC value of 159 µg/g was observed to predict endoscopic improvement with &gt;70% sensitivity and specificity; ROC area under the curve was 0.78 (Figure). Similar results were observed for clinical remission. Conclusion In this exploratory analysis using HICKORY OLI cohort data, changes in FC appear to associate with changes in ES. A cut-off FC value of 159 µg/g predicted endoscopic improvement. In UC, FC may be a useful non-invasive biomarker for ascertaining endoscopic disease activity in clinical trials; however, further clinical studies validating FC cut-offs against centrally read endoscopy are needed.

scholarly journals P225 Using a standardised reporting proforma is associated with improved endoscopic assessment in UC

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S255-S255
Author(s):  
R KADER ◽  
P Middleton ◽  
O Ahmad ◽  
R Dart ◽  
J McGuire ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Site Factors ◽  
Multi Centre Study ◽  
Gi Endoscopy ◽  
Mayo Score ◽  
Chi Squared ◽  
Index Of Severity ◽  
Level Of Training ◽  
Endoscopic Assessment

Abstract Background Repeated endoscopic assessments are an essential part of ulcerative colitis (UC) disease management and current guidelines recommend the use of an endoscopic activity score, either the endoscopic Mayo score or Ulcerative Colitis Endoscopic Index of Severity (UCEIS) as treatment targets. These indices have prognostic value, with endoscopic healing associated with favourable short- and long-term outcomes. This multi-centre study aimed to assess the frequency of using endoscopic disease activity scores in UC patients undergoing lower GI endoscopy. Methods Lower GI endoscopy reports from patients with UC were retrospectively reviewed from 7 sites in London between April and October 2018. Endoscopy reports were assessed based on the BRIDGe endoscopic reporting criteria including the use of Mayo or UCEIS score. The comparison was made between site factors (specialist IBD centres/non-specialist centres, use of reporting proforma), endoscopist speciality (gastroenterology, surgery or nurse endoscopist), level of training (consultant, registrar or nurse endoscopist) and interest in IBD. Chi-squared was used to compare groups. Results 899 lower GI endoscopy reports were reviewed. Mayo or UCEIS was used in 51% of cases (453/899). The use of endoscopic scores were significantly higher in gastroenterologists than in surgeons and nurse endoscopists respectively (401/762 (53%) vs. 22/54 (41%) vs. 30/83 (36%)), and higher in registrar trainees than consultants and nurse endoscopists (175/251 (70%) vs. 248/565 (44%) vs. 30/83 (36%)) and in those with a specialist interest in IBD compared with those without (237/409 (58%) vs. 216/490 (44%), p &lt; 0.0001). The use of endoscopic scores was more frequent in specialist IBD centres than in non-specialist centres (417/728 (58%) vs. 36/172 (21%), p &lt; 0.001). One centre used a reporting proforma which was associated with a significantly higher frequency of score use compared with centres without a proforma (202/260 (78%) vs. 251/639 (39%), p &lt; 0.0001). Conclusion Reporting of endoscopic disease activity using a standardised scoring system occurs in only half of cases from this large multi-centre cohort. Frequency of use is higher in specialist IBD centres and when performed by gastroenterology specialists. Endoscopy reports from a site that used a standardised reporting proforma were significantly more likely to include an endoscopic index as well as a range of other reporting items. This suggests, at least in part, that endoscopy reporting may be optimised by the introduction of a proforma. Integration of a standardised proforma into reporting software would target all endoscopists performing UC endoscopies regardless of speciality, site or IBD interest.

scholarly journals P198 Practical deep learning tool for the scoring of ulcerative colitis disease activity in central reading

2021 ◽  
Vol 15 (Supplement_1) ◽  
pp. S263-S264
Author(s):  
M Byrne ◽  
J East ◽  
M Iacucci ◽  
S Travis ◽  
R Kalapala ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Clinical Trials ◽  
Disease Activity ◽  
Video Quality ◽  
Opinion Leaders ◽  
Subject Matter Experts ◽  
Web Based ◽  
Software Interface ◽  
Index Of Severity

Abstract Background Central Reading Org.& the pharma industry employ subject matter experts(SMEs)to score videos from sites participating in clinical trials for Ulcerative Colitis(UC).As we are developing Artificial Intelligence(AI)models for scoring purposes,we need to build a new software interface that can incorporate these AI models to aid SMEs,making their determination of the scores for each segment of the video & for the video as a whole.We propose a system that reduces the time for SMEs to review & score videos,improving the accuracy of scoring,with the help of our AI models. Methods We built a web-based interface supported by our AI models which can read,write multiple databases & data stores to read & display videos to be scored by a central reader, as well as the associated metadata required to improve the process.User interface shows a timeline with markers for the segments of the colon,with sections that are blurry,poorly prepped,or unscorable highlighted in different colours.While we could also highlight sections of the video with the precise score assigned to it by the AI,this would bias the central reader’s opinion.We hide the precise score generated by our AI models & instead display 3 colours for low,medium or high disease activity.When a video is loaded to be read by the user,the playback marker is set to the first high disease activity section based on known medical indexes such as the Mayo Endoscopic Subscore(MES) & UCEIS(Ulcerative Colitis Endoscopic Index of Severity),usually consists of a few seconds of video & that video is played back continuously in a loop until the reader selects the appropriate score for that section.When the reader saves the section,the software immediately moves the video cursor to the highest scored section of the video.That way the central reader can review only the relevant portions of the video to confirm the score assigned to each segment.If the central reader’s scores do not align well with the AI scores then the software continues to show more sections of the video to the user,including sections it may have labeled as unscorable,that may be scorable. Results The review of the system by 3 key opinion leaders,user experience was positive.Not only does the system allow the reader’s attention to be more efficiently used,but the interface allows both AI & central reader scores to be saved,allowing for the latter to be used iteratively to re-train & improve the underlying AI model(s).Our tool was also used by a gastroenterologist specialist in order to perform video quality assessment & colon sections scoring. Conclusion We developed an AI tool that can be used to improve the efficiency & accuracy of the central reading process in clinical trials for UC.Further work is ongoing to improve the interface.

Validation of the Ulcerative Colitis Colonoscopic Index of Severity and Its Correlation With Disease Activity Measures

2013 ◽  
Vol 11 (1) ◽  
pp. 49-54.e1 ◽  
Author(s):  
Sunil Samuel ◽  
David H. Bruining ◽  
Edward V. Loftus ◽  
Kelvin T. Thia ◽  
Kenneth W. Schroeder ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Activity Measures ◽  
Index Of Severity ◽  
Disease Activity Measures

scholarly journals Efficacy of Sigmoidoscopy for Evaluating Disease Activity in Patients With Ulcerative Colitis

2021 ◽  
Author(s):  
Su Bum Park ◽  
Seong-Jung Kim ◽  
Jun Lee ◽  
Yoo Jin Lee ◽  
Dong Hoon Baek ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Proximal Colon ◽  
Concordance Rate ◽  
Tertiary Hospitals ◽  
High Concordance ◽  
Endoscopic Score ◽  
Index Of Severity ◽  
Endoscopic Assessment ◽  
Key Parameter

Abstract Background: Endoscopic assessment of disease activity is a key parameter in the management of ulcerative colitis. Whether sigmoidoscopy alone is sufficient to evaluate the disease activity in ulcerative colitis lacks studies. Methods: We retrospectively analyzed the medical records and endoscopic results of patients with ulcerative colitis followed by colonoscopy in seven tertiary hospitals between January 2012 and December 2018. Endoscopic disease activity was scored using the Mayo Endoscopic Score (MES) and Ulcerative Colitis Endoscopic Index of Severity (UCEIS) for each segment from the colonoscopy images. Concordance was evaluated by comparing the highest MES and UCEIS in the rectosigmoid and proximal regions to confirm the usefulness of sigmoidoscopy. Results: A total of 500 colonoscopic examinations from 333 patients were enrolled. Only in 7.6% [k(kappa): 0.893, r(Spearman): 0.906, p<0.001] and 8.6% [k(kappa): 0.890, r(Spearman): 0.914; p<0.001] of cases, MES and UCEIS scored more severely in the proximal colon. Comparison of active disease (MES ≥2) in the rectosigmoid area and the entire colon showed a high concordance rate [k(kappa): 0.899, r(Spearman): 0.904, p<0.001]. Endoscopic healing (MES=0) also showed a high concordance rate [k(kappa): 0.882, r(Spearman): 0.887, p<0.001]. In 38 cases (7.6%) of patients with a higher MES in the proximal area, it was significantly higher in patients with previous extensive colitisConclusions: Sigmoidoscopy and colonoscopy showed a high concordance rate. Therefore, sigmoidoscopy is considered a sufficient substitute for colonoscopy. However, colonoscopy should be considered in patients with previous extensive colitis

scholarly journals Role of Fecal Calprotectin as a Noninvasive Indicator for Ulcerative Colitis Disease Activity

Folia Medica ◽  
2019 ◽  
Vol 61 (2) ◽  
pp. 188-196 ◽  
Author(s):  
Radislav V. Nakov ◽  
Ventsislav N. Nakov ◽  
Vanya A. Gerova ◽  
Lyudmila T. Tankova
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Intestinal Inflammation ◽  
Point Of Care ◽  
Fecal Calprotectin ◽  
Non Invasive ◽  
Significant Difference ◽  
Endoscopic Score ◽  
Index Of Severity

Abstract Background: It is essential in clinical management to determine the disease activity in ulcerative colitis (UC) patients. At present, the most accurate way of evaluating the UC severity is endoscopy with biopsy. Fecal calprotectin (FCP) is a non-invasive biomarker that is frequently used for monitoring of intestinal inflammation. Aims: The purpose of our study was to assess the role of FCP as a noninvasive indicator for UC disease activity. Materials and methods: This prospective study enrolled 116 patients with UC (56 with quiescent UC and 60 with active UC) and 36 controls, referred for colonoscopy to our Center. Colonoscopy was performed in all the patients and the findings were graded according to Mayo endoscopic score (EMS) and UC endoscopic index of severity (UCEIS). FCP was analyzed in stool samples by means of point-of-care desk-top Quantum Blue® method. Results: There was no significant difference between mean FCP levels in controls and UC patients in remission (р=0.205). Mean FCP in patients with active UC was significantly higher than that in controls (p<0.001) and in patients in remission (p<0.001). FCP significantly correlated with UCEIS (r = 0.869, p<0.001) and EMS (r = 0.814, p<0.001). Conclusion: The strong correlation with endoscopic disease activity suggests that FCP is a useful biomarker for noninvasive diagnosis and monitoring of disease activity in UC patients.

scholarly journals Validation of the Ulcerative Colitis Endoscopic Index of Severity (UCEIS) and Its Correlation With Clinical Indices and Laboratory Measures of Disease Activity

2011 ◽  
Vol 140 (5) ◽  
pp. S-140 ◽  
Author(s):  
Sunil Samuel ◽  
Edward V. Loftus ◽  
David H. Bruining ◽  
Kelvin T. Thia ◽  
William J. Tremaine ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Clinical Indices ◽  
Index Of Severity ◽  
Laboratory Measures

Endoscopic and Histological Assessment, Correlation, and Relapse in Clinically Quiescent Ulcerative Colitis (MARQUEE)

2020 ◽  
Author(s):  
Mark T Osterman ◽  
Frank I Scott ◽  
Franz F Fogt ◽  
Erin D Gilroy ◽  
Susan Parrott ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Clinical Remission ◽  
Clinical Relapse ◽  
High Prevalence ◽  
Histological Indices ◽  
Index Of Severity ◽  
Multicenter Prospective Study ◽  
Multicenter Prospective Cohort Study ◽  
Research Alliance

Abstract Objective It is difficult to predict relapse in quiescent ulcerative colitis (UC), but newer endoscopic and histological indices could improve this. This study aimed to determine in UC patients in clinical remission (1) the prevalence of active endoscopic and histological disease; (2) the correlation between endoscopic and histological scores; and (3) the predictive power of these scores for clinical relapse. Design This multicenter prospective cohort study conducted by the Crohn’s and Colitis Foundation Clinical Research Alliance included 100 adults with UC in clinical remission undergoing surveillance colonoscopy for dysplasia. Endoscopic activity was assessed using the Mayo endoscopic score (MES), ulcerative colitis endoscopic index of severity (UCEIS), and ulcerative colitis colonoscopic index of severity (UCCIS). Histology was assessed with the Riley index subcomponents, total Riley score, and basal plasmacytosis. Results Only 5% of patients had an MES of 0, whereas 38% had a score of 2 to 3; using the UCEIS, the majority of patients had at least mild activity, and 15% had more severe activity. Many patients also had evidence of histological disease activity. The correlations among endoscopic indices, histological subcomponents, and total score were low; the highest correlations occurred with the subcomponent architectural irregularity (ρ = 0.43–0.44), total Riley score (ρ = 0.35–0.37), and basal plasmacytosis (ρ = 0.35–0.36). Nineteen patients relapsed clinically over 1 year, with the subcomponent architectural irregularity being the most predictive factor (P = 0.0076). Conclusions This multicenter prospective study found a high prevalence of both endoscopic and histological disease activity in clinically quiescent UC. The correlations between endoscopy and histology were low, and the power to predict clinical relapse was moderate.

P113 STUDY OF THE PROTEOMIC PROFILE IN PATIENTS WITH ULCERATIVE COLITIS, ITS CORRELATION WITH DIAGNOSIS AND DISEASE ACTIVITY

2018 ◽  
Vol 154 (1) ◽  
pp. S58
Author(s):  
Salah Badr El-Din ◽  
Ezzat Ali ◽  
Doaa Header ◽  
Pacint Moez ◽  
Mohamed Ibrahim
Keyword(s):  
Ulcerative Colitis ◽  
Disease Activity ◽  
Proteomic Profile
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