[Epidemiology in inflammatory bowel disease in five areas of Asturias. Spain]. / Epidemiología de la enfermedad inflamaroria intestinal crónica en cinco áreas de Asturias. España.

AIMS: The epidemiologic analysis inflammatory bowel disease (IBD) is a powerful research tool to assess the contribution of environmental factors to its etiology. IBD has been reported to have varying frequencies in different parts of the world, and there seem to be significant differences in the disease pattern and clinical course. The aim of the present study was to assess the disease pattern of IBD in Asturias (Spain). PATIENTS AND METHODS: A descriptive epidemiological population based study, retrospective (1954-1993) and prospective (1994-97), was performed to study 1018 patients found, bigger than 14 years, to have IBD, in five areas of Asturias (Spain) (461.965 inhabitants). RESULTS: During the period of time studied, we diagnosed 1018 IBD [565 ulcerative colitis (55.5%), 415 (40.8%) Crohn's disease and 38(3.7%) indeterminate colitis], with 482 females (47.2%), 536 males (52.8%), and male/female: 1.11. Age at diagnosis were 39.49 +/- 1.08 (95% CI : 38.41 +/- 40.57); (UC: 43.95 +/- 1.47; CD: 33.53 +/- 1.51; IC: 38.26 +/- 5.14. p = 0.000. Age at onset previously at diagnosis for UC: 42.84 +/- 1.34; CD: 30.68 +/- 1.40; IC: 36.74 +/- 4.86 (p = 0.000). Diagnosis criteria: UC: syntomatic 97.34% (p = ns), endoscopy 96.63% (p = 0.000 pathology 90.26% (p = 0.000). CD: radiology 83.61% (p =0.000). Study level in CD: 57.57 (p = 0.0005). Family history: 8.4%. The most frequent involvement at diagnosis of UC was proctitis only, in 13.6%, 269% rectum and sigmoid 26% let colitis, 20% pancolitis, and in CD colon only, in 16.7%, 30.3% terminal ileum, 41.3% ileo-colon of the patients. This also helps to explain the differences in severity, need for surgery, and survival noted between community based studies. CONCLUSIONS: We highlight the uniformity of distribution of the inflammatory bowel disease in relation to types and sex. The high frequency of familial Crohn's disease suggests a genetic predisposition. Highlighting a bigger morbilidad for the Crohn's Disease reflected in the surgical requirements, but however with smaller mortality that in ulcerative colitis.

[Incidence and prevalence of inflammatory bowel disease. Asturian study in 5 areas (EIICEA). Spain]. / Incidencia y prevalencia en enfermedad inflamatoria intestinal crónica. Estudio asturiano en cinco áreas (EIICEA). España.

AIMS: To know and to compare Inflammatory Bowel Disease (IBD) Incidence and Prevalence rates in in five areas of Asturias (Spain). We conducted a prospective epidemiologic study of IBD in the Province of Liege (1 million inhabitants). PATIENT AND METHODS: We conducted a descriptive, populational, collaborative epidemiologic study, retrospective between 1954 and 1993 and prospective between 1994 and 1997. All patients diagnosed according to a standard protocol for case ascertainment and definition of IBD, aged 14 years or more are included, in five areas of Asturias (Spain) (461,965 inhabitants). RESULTS: For the period 1954 to 1997, 1018 IBD have been diagnosed [565 ulcerative colitis (UC) (55.5%), 415 Crohn's disease (CD) (40.8%) and 38 undefined IBD (IC) (3.7%)]; [482 women (47.2%), 536 males (52.8%)]. In the 4 year-prospective period, 306 cases were collected: 176 UC (57.51%), 110 CD (35.94) and 20 IC (6.53%); UC/CD: 1.6. Without appreciable and significant differences between Frequency of illness groups and sexes. IBD incidence rate (per 100,000 per year) (1954-97) is 5.12 (95% CI = 3.05-7.18) (UC: 2.84; CD: 2.08; IC: 0.19; UC/CD 1.36). In the 4 years- prospective study, IBD incidence rate is 16.55 (95% CI = 12.84-20.25), (UC: 9.52; CD: 5.95; IC: 1.08; UC/CD: 1.6). IBD prevalence rate in 1997 is 205.21 (95% CI = 182.14-227.29), (UC: 109.96; CD: 87.45; IC: 7.79). Comparisons have settled down among the studied areas, without finding differences statistically significant. CONCLUSIONS: Inflammatory Bowel Disease incidence and prevalence rates of in our region are homogeneous between the cities investigated and superior than those historically reported in Spanish studies. These results were similar to those observed in European studies.

Estudio multicéntrico. EIICEA. Asturias. Incidencia y prevalencia en enfermedad inflamatoria intestinal crónica. Estudio asturiano en cinco áreas (EIICEA). España / Incidence and prevalence of inflammatory bowel disease in Asturias (Spain)

Objetivo: Conocer y comparar la incidencia y prevalencia de la enfermedad inflamatoria intestinal crónica (EIIC) en 5 áreas del Principado de Asturias (España).Pacientes y métodos: Estudio epidemiológico descriptivo, poblacional, multicéntrico, retrospectivo entre 1954 y 1993 y prospectivo entre 1994 y 1997. Se incluyen todos los enfermos mayores de 14 años, diagnosticados de EIIC según un protocolo estándar para el diagnóstico y definición, en 5 áreas del Principado de Asturias, con un censo de 461.965 habitantes. Resultados: En el periodo de tiempo estudiado, han sido diagnosticados 1018 enfermos con EIIC [565 CU (55,5%), 415 EC (40,8%) y 38 CI (3,7%)]; [482 mujeres (47,2%), 536 varones (52,8%)]. En el periodo de 4 años de estudio prospectivo, se identifican 306 EIIC: 176 CU (57,51%), 110 EC (35,94) y 20 CI (6,53%); CU/EC: 1,6. La frecuencia de aparición de los distintos grupos de enfermedad no presenta diferencias significativas, así como tampoco existen diferencias entre ambos sexos. La tasa de incidencia media anual (1954-97) en EIIC es 5,12 (IC 95% = 3,05 - 7,18) (CU: 2,84; EC: 2,08; CI: 0,19; CU/EC 1,36). En el periodo de tiempo de estudio prospectivo, la tasa de incidencia media anual de la EIIC es 16,55 (IC 95% =12,84 - 20,25), (CU: 9,52; EC: 5,95; CI: 1,08; CU/EC: 1,6). La prevalencia, referida a 1997 para la EIIC es de 205,21 (IC 95% = 182,14227,29), (CU: 109,96; EC: 87,45; CI: 7,79). Se han establecido comparaciones entre las áreas estudiadas, sin encontrar diferencias estadísticamente significativas. Conclusiones: Las tasas brutas de incidencia y de prevalencia de la enfermedad inflamatoria intestinal crónica en nuestro medio son superiores a las históricamente descritas en otras áreas de nuestro país y similares a las publicadas en poblaciones de alta incidencia. No hemos encontrado diferencias significativas entre las cinco áreas que componen el estudio (AU)

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