Epidemiology of inflammatory bowel disease in Mexico and Colombia: Analysis of health databases, mathematical modelling and a case-series study.

BACKGROUND AND AIMS: Ulcerative Colitis (UC) and Crohn's Disease (CD) have a major impact on quality of life and medical costs. The aim of the study was to estimate the prevalence, incidence and clinical phenotypes of Inflammatory Bowel Disease (IBD) cases in Mexico and Colombia. METHODS: We analyzed official administrative and health databases, used mathematical modelling to estimate the incidence and complete prevalence, and performed a case-series of IBD patients at a referral center both in Mexico and Colombia. RESULTS: The age-adjusted complete prevalence of UC per 100,000 inhabitants for 2015/2016 ranged from 15.65 to 71.19 in Mexico and from 27.40 to 69.97 in Colombia depending on the model considered. The prevalence of CD per 100,000 inhabitants in Mexico ranged from 15.45 to 18.08 and from 16.75 to 18.43 in Colombia. In Mexico, the age-adjusted incidence of UC per 100,000 inhabitants per year ranged from 0.90 to 2.30, and from 0.55 to 2.33 in Colombia. The incidence for CD in Mexico ranged from 0.35 to 0.66 whereas in Colombia, the age-adjusted incidence of CD ranged from 0.30 to 0.57. The case-series included 200 IBD patients from Mexico and 204 patients from Colombia. The UC/CD prevalence ratio in Mexico and Colombia was 1.50:1 and 4.5:1 respectively. In Mexico, the female/male prevalence ratio for UC was 1.50:1 and 1.28:1 for CD, while in Colombia this ratio was 0.68:1 for UC and 0.8:1 for CD. In Mexico the relapse rate for UC was 63.3% and 72.5% for CD, while those rates in Colombia were 58.2% for UC and 58.3% for CD. CONCLUSIONS: The estimated burden of disease of IBD in Mexico and Colombia is not negligible. Although these findings need to be confirmed by population-based studies, they are useful for decision-makers, practitioners and patients with this condition.

Clinical, biochemical, endoscopic and histopathological evaluation of biological treatment in ulcerative colitis / Evaluación clínica, bioquímica, endoscópica e histopatológica del tratamiento biológico de colitis ulcerativa

Introducción: El tratamiento biológico es una alternativa para manejar la colitis ulcerativa en pacientes refractarios al tratamiento convencional. Objetivo: Evaluar el tratamiento biológico en pacientes con colitis ulcerativa refractarios al tratamiento convencional en un hospital de 3er nivel de atención. Métodos: Estudio descriptivo, retrospectivo, longitudinal en pacientes con colitis ulcerativa refractarios al tratamiento convencional y que recibieron tratamiento biológico. Las cortes se evaluaron en tres momentos: estado basal (sin terapia biológica), a los seis y doce meses de inicio del tratamiento biológico. Se utilizó estadística descriptiva para la caracterización de la población en general, posteriormente los tres puntos de corte se describieron con sus respectivas variables. Resultados: Se incluyeron 18 pacientes con edad media de 41,2 años. Las evaluaciones, en un estado basal, a los seis y 12 meses; demostraron presencia de sangre en las evacuaciones y dolor abdominal en 94,4%, 22,2% y 11,1% respectivamente, concentración de hemoglobina >10,5 g/dl en 50%, 83,3% y 88,9%; concentración sérica de albúmina >3,2 g/dl en 72,2%, 83,3% y 88,9% y escala visual endoscópica de Mayo 38,9%, 33,3% y 16,7% presentaron Mayo 2 y 61,1%, 16,7% y 1,7% Mayo 3. La actividad histológica en la evaluación basal llego hasta un nivel severo (11,1%), mientras que en evaluaciones a seis y 12 meses llegaron hasta moderada en un 55,6% y 27,8% respectivamente. Conclusiones: La terapia biológica en pacientes con colitis ulcerativa refractaria demostró mejoría en manifestaciones clínicas, bioquímicas, endoscópicas e histológicas. No se registró remisión profunda de la enfermedad, ni reacciones adversas al tratamiento.

Background: Biological treatment is currently used as an alternative for the treatment of ulcerative colitis in patient's refractory to conventional treatment. Objective: To evaluate biological treatment in patients with ulcerative colitis refractory to conventional treatment in a 3rd level care Hospital. Methods: A descriptive, retrospective, longitudinal study was carried out in patients with UC who were refractory to conventional treatment and who received biological treatment. The variables were evaluated in 3 moments: basal state (without biological treatment), at six and twelve months from the start of biological treatment. Descriptive statistics were used to characterize general population, later the 3 states mentioned above were described with their respective variables. Results: Eighteen patients with a mean age of 41.2 years were included. Evaluations at baseline and at 6 and 12 months showed: presence of blood in stools and abdominal pain in 94.4%%, 22.2% and 11.1% respectively; hemoglobin concentration >10.5 g/dl in 50%, 83.3% and 88.9%; serum albumin concentration >3.2 g/dl in 72.2%, 83.3% and 88.9%; the visual Mayo endoscopic scale 38.9%, 33.3% and 16.7% presented Mayo 2 and 61.1%, 16.7% and 1.7% Mayo 3. The histological activity in the baseline evaluation reached a severe level (11.1%), while in evaluations at 6 and 12 months they reached moderate in 55.6% and 27.8% respectively. Conclusions: Biological therapy as a treatment in patients with ulcerative colitis showed improvement in clinical, biochemical, endoscopic and histological manifestations, so far none with deep remission of the disease, no adverse reactions to treatment have been presented.