ffectiveness and safety of ustekinumab dose escalation in Crohn’s disease: a multicenter observational study / Efectividad y seguridad del aumento de dosis de ustekinumab en la enfermedad de Crohn: un estudio observacional multicéntrico

Background: ustekinumab has proven effective in Crohn’s disease (CD). However, some patients will partially respond or lose response over time. Data supporting the effectiveness of dose escalation in this scenario is scarce. Aim: to evaluate the effectiveness of ustekinumab dose escalation in CD. Methods: patients with active CD (Harvey-Bradshaw ≥ 5) who had received intravenous (IV) induction and at least a subcutaneous (SC) dose were included in this retrospective observational study. Ustekinumab dose was escalated, either via shortening of the interval to six or four weeks or IV reinduction plus shortening to every four weeks. Results: ninety-one patients were included, and ustekinumab dose was escalated after a median of 35 weeks of treatment. At week 16 after intensification, steroid-free clinical response and remission were observed in 62.6 % and 25.3 % of patients, respectively. Systemic corticosteroids were discontinued in 46.7 % of patients who were on corticosteroids at baseline. Follow-up data beyond week 16 were available for 78 % of patients; at the last visit, 66.2 % and 43.7 % were in steroid-free clinical response and remission, respectively. After a median follow-up of 64 weeks, 81 % of patients were still treated with ustekinumab. Adverse events were reported in 4.3 % of patients; these were all mild and did not lead to hospitalization or discontinuation of treatment. Five patients (5.5 %) underwent surgical resection, with no immediate postsurgical complications. Conclusion: ustekinumab dose escalation was effective in recapturing response in over half of the patients. These findings suggest that dose escalation should be considered in patients who experience loss or partial response to the standard maintenance.(AU)

Effectiveness and safety of ustekinumab dose escalation in Crohn's disease: a multicenter observational study.

BACKGROUND: ustekinumab has proven effective in Crohn's disease (CD). However, some patients will partially respond or lose response over time. Data supporting the effectiveness of dose escalation in this scenario is scarce. AIM: to evaluate the effectiveness of ustekinumab dose escalation in CD. METHODS: patients with active CD (Harvey-Bradshaw ≥ 5) who had received intravenous (IV) induction and at least a subcutaneous (SC) dose were included in this retrospective observational study. Ustekinumab dose was escalated, either via shortening of the interval to six or four weeks or IV reinduction plus shortening to every four weeks. RESULTS: ninety-one patients were included, and ustekinumab dose was escalated after a median of 35 weeks of treatment. At week 16 after intensification, steroid-free clinical response and remission were observed in 62.6 % and 25.3 % of patients, respectively. Systemic corticosteroids were discontinued in 46.7 % of patients who were on corticosteroids at baseline. Follow-up data beyond week 16 were available for 78 % of patients; at the last visit, 66.2 % and 43.7 % were in steroid-free clinical response and remission, respectively. After a median follow-up of 64 weeks, 81 % of patients were still treated with ustekinumab. Adverse events were reported in 4.3 % of patients; these were all mild and did not lead to hospitalization or discontinuation of treatment. Five patients (5.5 %) underwent surgical resection, with no immediate postsurgical complications. CONCLUSION: ustekinumab dose escalation was effective in recapturing response in over half of the patients. These findings suggest that dose escalation should be considered in patients who experience loss or partial response to the standard maintenance.

Real-World Evidence of Tofacinitib in Ulcerative Colitis: Short-Term and Long-Term Effectiveness and Safety.

INTRODUCTION: The objective of this study was to assess the durability, short-term and long-term effectiveness, and safety of tofacitinib in ulcerative colitis (UC) in clinical practice. METHODS: This is a retrospective multicenter study including patients with UC who had received the first tofacitinib dose at least 8 weeks before the inclusion. Clinical effectiveness was based on partial Mayo score. RESULTS: A total of 408 patients were included. Of them, 184 (45%) withdrew tofacitinib during follow-up (mean = 18 months). The probability of maintaining tofacitinib was 67% at 6 m, 58% at 12 m, and 49% at 24 m. The main reason for tofacitinib withdrawal was primary nonresponse (44%). Older age at the start of tofacitinib and a higher severity of clinical activity were associated with tofacitinib withdrawal. The proportion of patients in remission was 38% at week 4, 45% at week 8, and 47% at week 16. Having moderate-to-severe vs mild disease activity at baseline and older age at tofacitinib start were associated with a lower and higher likelihood of remission at week 8, respectively. Of 171 patients in remission at week 8, 83 (49%) relapsed. The probability of maintaining response was 66% at 6 m and 54% at 12 m. There were 93 adverse events related to tofacitinib treatment (including 2 pulmonary thromboembolisms [in patients with risk factors] and 2 peripheral vascular thrombosis), and 29 led to tofacitinib discontinuation. DISCUSSION: Tofacitinib is effective in both short-term and long-term in patients with UC. The safety profile is similar to that previously reported.

Using Interpretable Machine Learning to Identify Baseline Predictive Factors of Remission and Drug Durability in Crohn's Disease Patients on Ustekinumab.

Ustekinumab has shown efficacy in Crohn's Disease (CD) patients. To identify patient profiles of those who benefit the most from this treatment would help to position this drug in the therapeutic paradigm of CD and generate hypotheses for future trials. The objective of this analysis was to determine whether baseline patient characteristics are predictive of remission and the drug durability of ustekinumab, and whether its positioning with respect to prior use of biologics has a significant effect after correcting for disease severity and phenotype at baseline using interpretable machine learning. Patients' data from SUSTAIN, a retrospective multicenter single-arm cohort study, were used. Disease phenotype, baseline laboratory data, and prior treatment characteristics were documented. Clinical remission was defined as the Harvey Bradshaw Index ≤ 4 and was tracked longitudinally. Drug durability was defined as the time until a patient discontinued treatment. A total of 439 participants from 60 centers were included and a total of 20 baseline covariates considered. Less exposure to previous biologics had a positive effect on remission, even after controlling for baseline disease severity using a non-linear, additive, multivariable model. Additionally, age, body mass index, and fecal calprotectin at baseline were found to be statistically significant as independent negative risk factors for both remission and drug survival, with further risk factors identified for remission.

Ustekinumab en la enfermedad de Crohn: resultados en la vida real y posibles factores de respuesta / Ustekinumab in Crohn's disease: real-world outcomes and predictors of response

Antecedentes: ustekinumab es un anticuerpo monoclonal que inhibe las interleucinas IL-12 e IL-23, y está aprobado para el tratamiento de la enfermedad de Crohn (EC) y, más recientemente, también de la colitis ulcerosa (CU). El objetivo de este estudio fue evaluar la eficacia y seguridad de ustekinumab, así como identificar posibles factores predictivos de respuesta en un entorno de la vida real.Métodos: se realizó un estudio observacional, retrospectivo y multicéntrico en 4 hospitales de Andalucía. Se incluyeron pacientes adultos con diagnóstico confirmado de EC tratados con ustekinumab entre 2017 y 2019. Se analizó la respuesta clínica a los 3, 6 y 12 meses de tratamiento. La actividad clínica de la enfermedad se evaluó con el índice de Harvey-Bradshaw (HBI) y el índice de actividad de la enfermedad de Crohn (CDAI); La respuesta bioquímica se evaluó con parámetros de laboratorio como CRP y ESR. Se analizó la supervivencia al fármaco ustekinumab a un año.Resultados: Se analizaron un total de 98 pacientes (edad media, 43 años; el 52 % eran hombres); El 56 % había fracasado con ≥ 2 terapias biológicas previas. A los 3 meses, el 69 % de los pacientes estaban en respuesta y el 40,8 % en remisión. A los 6 meses, el 56 % estaba en remisión clínica. A los 12 meses, el 73,7 % estaba en respuesta clínica y el 60,5 % en remisión. La remisión sin corticosteroides fue del 32,4 %, 44 % y 47,4 % a los 3, 6 y 12 meses, respectivamente. La supervivencia acumulada tras un año de tratamiento con ustekinumab fue del 85,3 %. Los parámetros bioquímicos como CRP y ESR mostraron una disminución estadísticamente significativa entre los niveles de referencia y de control a los 3, 6 y 12 meses. Un HBI más bajo al inicio y el sexo femenino fueron predictores de remisión clínica libre de corticosteroides en un análisis univariante. (AU)

Long-Term Real-World Effectiveness and Safety of Ustekinumab in Crohn's Disease Patients: The SUSTAIN Study.

BACKGROUND: Large real-world-evidence studies are required to confirm the durability of response, effectiveness, and safety of ustekinumab in Crohn's disease (CD) patients in real-world clinical practice. METHODS: A retrospective, multicentre study was conducted in Spain in patients with active CD who had received ≥1 intravenous dose of ustekinumab for ≥6 months. Primary outcome was ustekinumab retention rate; secondary outcomes were to identify predictive factors for drug retention, short-term remission (week 16), loss of response and predictive factors for short-term efficacy and loss of response, and ustekinumab safety. RESULTS: A total of 463 patients were included. Mean baseline Harvey-Bradshaw Index was 8.4. A total of 447 (96.5%) patients had received prior biologic therapy, 141 (30.5%) of whom had received ≥3 agents. In addition, 35.2% received concomitant immunosuppressants, and 47.1% had ≥1 abdominal surgery. At week 16, 56% had remission, 70% had response, and 26.1% required dose escalation or intensification; of these, 24.8% did not subsequently reduce dose. After a median follow-up of 15 months, 356 (77%) patients continued treatment. The incidence rate of ustekinumab discontinuation was 18% per patient-year of follow-up. Previous intestinal surgery and concomitant steroid treatment were associated with higher risk of ustekinumab discontinuation, while a maintenance schedule every 12 weeks had a lower risk; neither concomitant immunosuppressants nor the number of previous biologics were associated with ustekinumab discontinuation risk. Fifty adverse events were reported in 39 (8.4%) patients; 4 of them were severe (2 infections, 1 malignancy, and 1 fever). CONCLUSIONS: Ustekinumab is effective and safe as short- and long-term treatment in a refractory cohort of CD patients in real-world clinical practice.

This large retrospective study demonstrated the short- and long-term effectiveness and safety of ustekinumab in patients with Crohn's disease in real-world clinical practice, including those with refractory disease.

Efficacy and safety of tofacitinib in the treatment of ulcerative colitis: real-life experience in Andalusia.

BACKGROUND: tofacitinib is a Janus kinase inhibitor approved for the treatment of moderate-severe ulcerative colitis (UC). This study aimed to evaluate its efficacy in a real-life setting. METHODS: a retrospective and multicenter observational study was performed with UC patients treated with tofacitinib. Short and long-term treatment effectiveness, treatment survival, need for dose escalation and safety were analyzed. Clinical response and remission were defined in accordance with the partial Mayo score. RESULTS: seventy-four patients were included, 98.3 % had received prior biological treatment, 55.4 % with three or more biologicals and up to 64.9% with two or three different mechanisms of action. Clinical remission and response rates were 37.8 % and 77 % at eight weeks, and 41.8 % and 70.1 % at 16 weeks. With regard to non-responders at eight weeks, 37.5 % achieved a delayed clinical response at 16 weeks. Mean treatment duration was 19 months (95 % CI: 16-22), with a treatment survival of 56 % at 28 months, and remission and response rates at 24 months of 53.8 % and 61.5 %. Twenty-three treatments were withdrawn, most of them (18) during the induction period. There were adverse events in a quarter of the patients; only four were severe and led to treatment discontinuation. CONCLUSION: tofacitinib has a demonstrated efficacy in clinical practice to induce and maintain clinical response in treatment-refractory UC patients, with an acceptable safety profile.

Ustekinumab in Crohn's disease: real-world outcomes and predictors of response.

BACKGROUND: ustekinumab is a monoclonal antibody that inhibits interleukins IL-12 and IL-23, and is approved for the treatment of Crohn's disease (CD) and, more recently, also ulcerative colitis (UC). The aim of this study was to evaluate the effectiveness and safety of ustekinumab, as well as to identify possible predictive factors of response in a real-life setting. METHODS: an observational, retrospective, multicenter study was carried out in 4 hospitals in Andalusia. Adult patients with a confirmed diagnosis of CD treated with ustekinumab from 2017 to 2019 were included. Clinical response was analyzed at 3, 6 and 12 months of treatment. Clinical disease activity was assessed with the Harvey-Bradshaw index (HBI) and the Crohn's Disease Activity Index (CDAI); biochemical response was assessed with lab parameters such as CRP and ESR. One-year ustekinumab drug-survival was analyzed. RESULTS: a total of 98 patients were analyzed (mean age, 43 years; 52 % were male); 56 % had failed with ≥ 2 previous biologicals therapies. At 3 months, 69 % of the patients were in response and 40.8 % in remission. At 6 months, 56 % were in clinical remission. At 12 months, 73.7 % were in clinical response and 60.5 % in remission. Corticosteroid-free remission was 32.4 %, 44 %, and 47.4 % at 3, 6, and 12 months, respectively. Cumulative survival after one year of treatment with ustekinumab was 85.3 %. Biochemical parameters such as CRP and ESR showed a statistically significant decrease between baseline and control levels at 3, 6, and 12 months. A lower HBI at baseline and female sex were predictors of corticosteroid-free clinical remission in a univariate analysis. In the multivariate analysis no variables were found as predictors of corticosteroid-free clinical remission. CONCLUSION: ustekinumab therapy is safe and useful, inducing clinical response in more than 50 % of patients, including patients who failed with other biological therapies.

Debut de colitis ulcerosa en contexto de tratamiento con secukinumab: ¿los anti-IL-17A pueden ser un factor desencadenante para la aparición de la enfermedad inflamatoria intestinal? / The onset of ulcerative colitis during treatment with secukinumab: can anti-IL-17A be a trigger for inflammatory bowel disease?

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Reinducción intravenosa de ustekinumab tras pérdida de respuesta secundaria como estrategia de rescate en la enfermedad de Crohn / Intravenous ustekinumab reinduction as a Crohn's disease rescue strategy following a secondary non-response

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Intravenous ustekinumab reinduction as a Crohn's disease rescue strategy following a secondary non-response.

Secondary non-response to biological treatments tends to occur in a high number of patients who undergo treatment with antiTNF, and it has also been observed in patients treated with vedolizumab or ustekinumab. The initial rescue guideline recommends intensifying the treatment by reducing the interval or increasing maintenance dosage. In the case of ustekinumab, the patients who began this treatment prior to its approval for treatment of Crohn's disease, were given a subcutaneous induction with no defined guideline and a maintenance dosage of 90 mg every eight weeks. Following secondary non-response in these patients, it was proposed that rescue be undertaken via intravenous reinduction adjusted for weight. We present a case of a patient with Crohn's disease with failure to respond to infliximab, adalimumab and vedolizumab who began treatment with ustekinumab prior to official approval. There was non-response at eight months but remission was achieved after reinduction with ustekinumab, adjusted for weight. This rescue guideline could be a cost-effective way to reinduce remission in this group of patients.

The onset of ulcerative colitis during treatment with secukinumab: can anti-IL-17A be a trigger for inflammatory bowel disease?

In recent months, cases of IBD have been reported in the context of treatment with secukinumab, a monoclonal antibody that blocks IL-17A and which is used in the treatment of certain rheumatic disorders. We present a case of a patient with psoriatic arthritis, with a first-degree relative who had suffered ulcerative colitis, who presented with onset ulcerative colitis in the weeks following treatment initiation with this drug.

Endometriosis ileal y enfermedad de Crohn / Ileum endometriosis and Crohn's disease

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Switching from reference infliximab to CT-P13 in patients with inflammatory bowel disease: results of a multicenter study after 12 months

Background and aims: infliximab has changed the natural history of inflammatory bowel disease (IBD). The advent of biosimilar treatments such as CT-P13 will hopefully improve the availability of biological therapies. Data with regard to drug switching are currently limited. The objective of the study was to assess the effectiveness and safety of switching from the reference product (RP), infliximab, to CT-P13 in patients with IBD. Methods: this was a multicenter prospective observational study in patients with Crohn's disease (CD) and ulcerative colitis (UC). All patients had switched from infliximab RP (Remicade(R)) to CT-P13 treatment and were followed up for 12 months. The efficacy endpoint was the change in clinical remission assessed at 0 and 12 months, according to the Harvey-Bradshaw score and partial Mayo score for patients with CD and UC, respectively. Adverse events were monitored and recorded throughout the study. Results: a total of 167 patients (116 CD/51 UC) were included; 88.8% (103/116) of patients with CD were in remission at the time of the drug switch and 69.7% were in remission at 12 months. The Harvey-Bradshaw (HB) score significantly changed at 12 months (p = 0.001); 84.3% (43/51) of patients with UC were in remission at the time of the drug switch and 76.7% were in remission at 12 months. No significant changes in the median partial Mayo score (p = 0.87) were observed at 12 months. Serious adverse events related to medication were reported in 12/167 (7.2%) cases. Conclusion: switching from infliximab RP to CT-P13 is safe and effective at 12 months. The loss of efficacy at 12 months was 15.7%

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Switching from reference infliximab to CT-P13 in patients with inflammatory bowel disease: results of a multicenter study after 12 months.

BACKGROUND AND AIMS: infliximab has changed the natural history of inflammatory bowel disease (IBD). The advent of biosimilar treatments such as CT-P13 will hopefully improve the availability of biological therapies. Data with regard to drug switching are currently limited. The objective of the study was to assess the effectiveness and safety of switching from the reference product (RP), infliximab, to CT-P13 in patients with IBD. METHODS: this was a multicenter prospective observational study in patients with Crohn's disease (CD) and ulcerative colitis (UC). All patients had switched from infliximab RP (Remicade®) to CT-P13 treatment and were followed up for 12 months. The efficacy endpoint was the change in clinical remission assessed at 0 and 12 months, according to the Harvey-Bradshaw score and partial Mayo score for patients with CD and UC, respectively. Adverse events were monitored and recorded throughout the study. RESULTS: a total of 167 patients (116 CD/51 UC) were included; 88.8% (103/116) of patients with CD were in remission at the time of the drug switch and 69.7% were in remission at 12 months. The Harvey-Bradshaw (HB) score significantly changed at 12 months (p = 0.001); 84.3% (43/51) of patients with UC were in remission at the time of the drug switch and 76.7% were in remission at 12 months. No significant changes in the median partial Mayo score (p = 0.87) were observed at 12 months. Serious adverse events related to medication were reported in 12/167 (7.2%) cases. CONCLUSION: switching from infliximab RP to CT-P13 is safe and effective at 12 months. The loss of efficacy at 12 months was 15.7%.

Manejo del déficit de hierro y la anemia ferropénica en la enfermedad inflamatoria intestinal. Resultados de la encuesta "Gestiona Hierro-EII" / Managing iron deficiency and iron deficiency anemia in inflammatory bowel disease. The results of the "Gestiona hierro-EII" survey

Introducción: la anemia ferropénica es una manifestación común y muy relevante de la enfermedad inflamatoria intestinal (EII). Aunque se han publicado guías de práctica clínica y puestas al día sobre el tema, el manejo práctico de esta complicación dista de ser óptimo. Objetivo: conocer el manejo real, las necesidades y las limitaciones de la anemia en la EII mediante una encuesta a especialistas de digestivo. Material y métodos: encuesta telemática autoadministrada, realizada entre abril- mayo 2017, y dirigida a socios de la SEPD con actividad clínica. La encuesta incluye cuatro apartados: demografía de los participantes, monitorización, tratamiento y limitaciones/necesidades. Resultados: ciento veintidós encuestas evaluables procedentes de todas las comunidades autónomas. La anemia ferropénica se considera una manifestación frecuente de la EII y que se monitoriza en todos los pacientes mediante determinación de la hemoglobina y la ferritina. En caso de anemia, los encuestados consideran necesario descartar la existencia de actividad de la EII, aunque solo el 14,8% indica el hierro intravenoso si la EII está activa. La dosis necesaria de hierro intravenoso es mayoritariamente calculada según las necesidades del paciente, pero solo el 33,1% utiliza dosis por infusión de 1 g o más elevadas. Conclusiones: la encuesta "Gestiona Hierro EII" sobre el manejo de la anemia en la EII demuestra una alta calidad asistencial, pero con aspectos a mejorar como la indicación de hierro intravenoso en los pacientes con actividad, el uso de hierro intravenoso de altas dosis o la aplicación de algoritmos en la práctica asistencial (AU)

Introduction: iron deficiency anemia is a common and very relevant manifestation of inflammatory bowel disease (IBD). Although clinical practice guidelines have been published and updated on this subject, the management in the daily practice of this complication is far from optimal. Objective: to determine the actual management, needs and limitations of anemia in IBD by means of a survey of gastroenterology specialists. Material and methods: a self-administered telematic survey was carried out between April and May 2017 and was sent to SEPD members. The survey included four sections: participant demographics, monitoring, treatment and limitations/needs. Results: a total of 122 evaluable surveys were received from all Spanish autonomous communities. Iron deficiency anemia is considered as a frequent manifestation of IBD and is monitored in all patients via the measurement of hemoglobin and ferritin. In the case of anemia, the survey respondents found it necessary to rule out the presence of IBD activity. However, only 14.8% prescribed intravenous iron when IBD was active. The required dose of intravenous iron is mainly calculated according to patient needs but only 33.1% of clinicians infused doses of 1 g or more. Conclusions: the "Gestiona Hierro EII" survey on the management of anemia in IBD demonstrated a high quality of care, even though some aspects need to be improved. These included the prescription of intravenous iron for patients with disease activity, the use of high-dose intravenous iron and the implementation of algorithms into clinical practic (AU)

Managing iron deficiency and iron deficiency anemia in inflammatory bowel disease. The results of the "Gestiona hierro-EII" survey.

INTRODUCTION: iron deficiency anemia is a common and very relevant manifestation of inflammatory bowel disease (IBD). Although clinical practice guidelines have been published and updated on this subject, the management in the daily practice of this complication is far from optimal. OBJECTIVE: to determine the actual management, needs and limitations of anemia in IBD by means of a survey of gastroenterology specialists. MATERIAL AND METHODS: a self-administered telematic survey was carried out between April and May 2017 and was sent to SEPD members. The survey included four sections: participant demographics, monitoring, treatment and limitations/needs. RESULTS: a total of 122 evaluable surveys were received from all Spanish autonomous communities. Iron deficiency anemia is considered as a frequent manifestation of IBD and is monitored in all patients via the measurement of hemoglobin and ferritin. In the case of anemia, the survey respondents found it necessary to rule out the presence of IBD activity. However, only 14.8% prescribed intravenous iron when IBD was active. The required dose of intravenous iron is mainly calculated according to patient needs but only 33.1% of clinicians infused doses of 1 g or more. CONCLUSIONS: the "Gestiona Hierro EII" survey on the management of anemia in IBD demonstrated a high quality of care, even though some aspects need to be improved. These included the prescription of intravenous iron for patients with disease activity, the use of high-dose intravenous iron and the implementation of algorithms into clinical practice.

Accurate cut-offs for predicting endoscopic activity and mucosal healing in Crohn’s disease with fecal calprotectin

Background: Fecal biomarkers, especially fecal calprotectin, are useful for predicting endoscopic activity in Crohn’s disease; however, the cut-off point remains unclear. The aim of this paper was to analyze whether faecal calprotectin and M2 pyruvate kinase are good tools for generating highly accurate scores for the prediction of the state of endoscopic activity and mucosal healing. Methods: The simple endoscopic score for Crohn’s disease and the Crohn’s disease activity index was calculated for 71 patients diagnosed with Crohn’s. Fecal calprotectin and M2-PK were measured by the enzyme-linked immunosorbent assay test. Results: A fecal calprotectin cut-off concentration of ≥ 170 μg/g (sensitivity 77.6%, specificity 95.5% and likelihood ratio +17.06) predicts a high probability of endoscopic activity, and a fecal calprotectin cut-off of ≤ 71 μg/g (sensitivity 95.9%, specificity 52.3% and likelihood ratio -0.08) predicts a high probability of mucosal healing. Three clinical groups were identified according to the data obtained: endoscopic activity (calprotectin ≥ 170), mucosal healing (calprotectin ≤ 71) and uncertainty (71 > calprotectin < 170), with significant differences in endoscopic values (F = 26.407, p < 0.01). Clinical activity or remission modified the probabilities of presenting endoscopic activity (100% vs 89%) or mucosal healing (75% vs 87%) in the diagnostic scores generated. M2-PK was insufficiently accurate to determine scores. Conclusions: The highly accurate scores for fecal calprotectin provide a useful tool for interpreting the probabilities of presenting endoscopic activity or mucosal healing, and are valuable in the specific clinical context (AU)

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Accurate cut-offs for predicting endoscopic activity and mucosal healing in Crohn's disease with fecal calprotectin.

BACKGROUND: Fecal biomarkers, especially fecal calprotectin, are useful for predicting endoscopic activity in Crohn's disease; however, the cut-off point remains unclear. The aim of this paper was to analyze whether faecal calprotectin and M2 pyruvate kinase are good tools for generating highly accurate scores for the prediction of the state of endoscopic activity and mucosal healing. METHODS: The simple endoscopic score for Crohn's disease and the Crohn's disease activity index was calculated for 71 patients diagnosed with Crohn's. Fecal calprotectin and M2-PK were measured by the enzyme-linked immunosorbent assay test. RESULTS: A fecal calprotectin cut-off concentration of ≥ 170 µg/g (sensitivity 77.6%, specificity 95.5% and likelihood ratio +17.06) predicts a high probability of endoscopic activity, and a fecal calprotectin cut-off of ≤ 71 µg/g (sensitivity 95.9%, specificity 52.3% and likelihood ratio -0.08) predicts a high probability of mucosal healing. Three clinical groups were identified according to the data obtained: endoscopic activity (calprotectin ≥ 170), mucosal healing (calprotectin ≤ 71) and uncertainty (71 > calprotectin < 170), with significant differences in endoscopic values (F = 26.407, p < 0.01). Clinical activity or remission modified the probabilities of presenting endoscopic activity (100% vs 89%) or mucosal healing (75% vs 87%) in the diagnostic scores generated. M2-PK was insufficiently accurate to determine scores. CONCLUSIONS: The highly accurate scores for fecal calprotectin provide a useful tool for interpreting the probabilities of presenting endoscopic activity or mucosal healing, and are valuable in the specific clinical context.