Accuracy of Fecal Immunochemical Test to Predict Endoscopic and Histological Healing in Ulcerative colitis: A Prospective Study based on Validated Histologic Scores
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AbstractBackground and Aims
Endoscopic and histological healing are associated with improved clinical outcomes in ulcerative colitis [UC]. We aimed to investigate the predictive value of faecal immunochemical test [FIT] for endoscopic and histological healing in UC.

We measured quantitative FIT and faecal calprotectin [FC] in 140 consecutive UC patients who underwent colonoscopy. We assessed the diagnostic accuracy of FIT for predicting endoscopic healing using the Mayo endoscopic subscore [MES 0/1] and for histological healing using the Geboes score [< 2.0] and Nancy index [grade ≤ 1]. The predictive abilities of FIT were compared with those of FC.

FIT had an area under the curve [AUC] of 0.77 (95% confidence interval [CI] 0.67–0.86, p < 0.001) for endoscopic healing, an AUC of 0.77 [95% CI 0.67–0.86, p < 0.001] using the Geboes score, and 0.77 [95% CI 0.66–0.85, p < 0.001] using the Nancy Index for histological healing. The AUC of FIT was comparable to that of FC for endoscopic healing [p = 0.773] and histological healing [p = 0.767–0.960], and was comparable to colonoscopy for histological healing [p = 0.384–0.673]. FIT < 50 ng/ml predicted endoscopic healing with a sensitivity, specificity, and positive predictive value [PPV] of 72%, 68%, and 82%, respectively, and for histological healing with a sensitivity, specificity, and PPV of 73–75%, 67%, and 78–80%, respectively. Combining FIT with FC led to a higher specificity [90%] for histological healing. Over 85% of patients with FIT < 50 ng/ml and FC < 50 μg/g achieved histological healing.

FIT is highly sensitive and accurate to predict endoscopic and histological healing in UC. It represents a promising non-invasive tool for monitoring mucosal healing in UC.
All Author(s) ListShi HY, Chan FKL, Chan AWH, Higashimori A, Kyaw M, Ching JYL, Luk AKC, Wong SH, Wu JCY, Sung JJY, Ng SC
Journal nameJournal of Crohn's and Colitis
Volume Number11
Issue Number9
PublisherOxford University Press (OUP): Policy B - Oxford Open Option B
Pages1071 - 1077
LanguagesEnglish-United States

Last updated on 2021-14-04 at 00:11