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Larrosa-Haro A, Abundis-Castro L, Contreras MB, Gallo MJ, Peña-Quintana L, Targa Ferreira CH, Nacif PA, Vázquez-Frías R, Bravo S, Muñoz-Urribarri AB, Mejía-Castro M, Orsi M, Amil-Díaz J, Busoni V, Cohen-Sabban J, Martin-Capri FJ, Zablah R, Rodríguez-Guerrero MG, Sdepanian VL. Epidemiologic trend of pediatric inflammatory bowel disease in Latin America: The Latin American Society for Pediatric Gastroenterology, Hepatology and Nutrition (LASPGHAN) Working Group. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2021; 86:328-334. [PMID: 34518143 DOI: 10.1016/j.rgmxen.2021.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 07/25/2020] [Indexed: 02/07/2023]
Abstract
INTRODUCTION AND AIMS The primary aim was to explore the epidemiologic trend of pediatric inflammatory bowel disease in Latin America, and the secondary aims were to obtain an overview of the diagnostic/therapeutic focus of the members of the LASPGHAN and examine the relation of case frequency to year, during the study period. MATERIALS AND METHODS Latin American pediatric gastroenterologists participated in an online survey, conducted through the SurveyMonkey platform, that investigated the yearly frequency of new inflammatory bowel disease patients within the time frame of 2005-2016, their disease variety, the gastrointestinal segments affected, and the diagnostic and treatment methods utilized. The correlation of new case frequency with each study year was evaluated. RESULTS A total of 607 patients were studied. The diagnoses were ulcerative colitis in 475 (78.3%) cases, Crohn's disease in 104 (17.1%), and inflammatory bowel disease D unclassified in 28 (4.6%). The trend in ulcerative colitis was a lineal increase in the frequency of new cases related to each study year, with a significant correlation coefficient. Pancolitis was found in 67.6% of the patients. The diagnostic methods included clinical data, endoscopy, and biopsies in more than 99% of the cases, and imaging studies were indicated selectively. Drug regimens were limited to 5-aminosalicylic acid derivatives, azathioprine, 6-mercaptopurine, infliximab, and adalimumab. CONCLUSIONS Pediatric inflammatory bowel disease in Latin America appears to have increased during the years included in the study period, with a predominance of moderate or severe ulcerative colitis. That lineal trend suggests the predictive likelihood of a gradual increase in the coming years, with possible epidemiologic and clinical implications.
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Affiliation(s)
- A Larrosa-Haro
- Instituto de Nutrición Humana, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico.
| | - L Abundis-Castro
- Banco de Leche Humana, Secretaría de Salud del Estado de Sonora, Sonora, Mexico
| | - M B Contreras
- Servicio de Atención Médica Integral para la Comunidad Juan P. Garrahan, Hospital de Pediatría, Buenos Aires, Argentina
| | - M J Gallo
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - L Peña-Quintana
- Unidad de Gastroenterología, Hepatología y Nutrición Pediátrica, Hospital Universitario Materno Infantil, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - C H Targa Ferreira
- Departamento de Pediatría, Universidad Federal de Ciencias, Porto Alegre, Brazil
| | - P A Nacif
- Servicio de Gastroenterología, Centro Hospitalario Pereira Rossel (CHPR), Montevideo, Uruguay
| | - R Vázquez-Frías
- Departamento de Gastroenterología y Nutrición, Hospital Infantil de México Federico Gómez, Mexico City, Mexico
| | - S Bravo
- Hospital de Niños Víctor J. Vilela, Rosario (Santa Fe), Argentina
| | | | - M Mejía-Castro
- Centro de Gastroenterología Endoscopia y Nutrición Pediátrica, Managua, Nicaragua
| | - M Orsi
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J Amil-Díaz
- Departamento de Pediatría Médica, Hospital de Sao Joao, Oporto, Portugal
| | - V Busoni
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J Cohen-Sabban
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - F J Martin-Capri
- Servicio de Gastroenterología, Hepatología y Nutrición Pediátrica, Hospital Sant Joan de Déu, Esplugues de Llobregat (Barcelona), Spain
| | - R Zablah
- Servicio de Gastroenterología Pediátrica, Hospital Nacional de Niños Benjamín Bloom, San Salvador, El Salvador
| | - M G Rodríguez-Guerrero
- Servicio de Gastroenterología Pediátrica, Hospital de Niños José Manuel de los Ríos, Caracas, Venezuela
| | - V L Sdepanian
- Departamento de Pediatría, Universidad Federal de São Paulo, São Paulo, Brazil
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Larrosa-Haro A, Abundis-Castro L, Contreras MB, Gallo MJ, Peña-Quintana L, Targa Ferreira CH, Nacif PA, Vázquez-Frías R, Bravo S, Muñoz-Urribarri AB, Mejía-Castro M, Orsi M, Amil-Díaz J, Busoni V, Cohen-Sabban J, Martin-Capri FJ, Zablah R, Rodríguez-Guerrero MG, Sdepanian VL. Epidemiologic trend of pediatric inflammatory bowel disease in Latin America: The Latin American Society for Pediatric Gastroenterology, Hepatology and Nutrition (LASPGHAN) Working Group. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2020; 86:S0375-0906(20)30120-8. [PMID: 33223251 DOI: 10.1016/j.rgmx.2020.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 07/09/2020] [Accepted: 07/25/2020] [Indexed: 06/11/2023]
Abstract
INTRODUCTION AND OBJECTIVES The primary aim was to explore the epidemiologic trend of pediatric inflammatory bowel disease in Latin America, and the secondary aims were to obtain an overview of the diagnostic/therapeutic focus of the members of the LASPGHAN and examine the relation of case frequency to year, during the study period. MATERIALS AND METHODS Latin American pediatric gastroenterologists participated in an online survey, conducted through the SurveyMonkey platform, that investigated the yearly frequency of new inflammatory bowel disease patients within the time frame of 2005 to 2016, their disease variety, the gastrointestinal segments affected, and the diagnostic and treatment methods utilized. The correlation of new case frequency with each study year was evaluated. RESULTS A total of 607 patients were studied. The diagnoses were ulcerative colitis in 475 (78.3%) cases, Crohn's disease in 104 (17.1%), and inflammatory bowel disease D unclassified in 28 (4.6%). The trend in ulcerative colitis was a lineal increase in the frequency of new cases related to each study year, with a significant correlation coefficient. Pancolitis was found in 67.6% of the patients. The diagnostic methods included clinical data, endoscopy, and biopsies in more than 99% of the cases, and imaging studies were indicated selectively. Drug regimens were limited to 5-aminosalicylic acid derivatives, azathioprine, 6-mercaptopurine, infliximab, and adalimumab. CONCLUSIONS Pediatric inflammatory bowel disease in Latin America appears to have increased during the years included in the study period, with a predominance of moderate or severe ulcerative colitis. That lineal trend suggests the predictive likelihood of a gradual increase in the coming years, with possible epidemiologic and clinical implications.
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Affiliation(s)
- A Larrosa-Haro
- Instituto de Nutrición Humana, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, México.
| | - L Abundis-Castro
- Banco de Leche Humana, Secretaría de Salud del Estado de Sonora, Sonora, México
| | - M B Contreras
- Servicio de Atención Médica Integral para la Comunidad Juan P. Garrahan, Hospital de Pediatría, Buenos Aires, Argentina
| | - M J Gallo
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - L Peña-Quintana
- Unidad de Gastroenterología, Hepatología y Nutrición Pediátrica, Hospital Universitario Materno Infantil, Universidad de Las Palmas de Gran Canaria, Las Palmas, España
| | - C H Targa Ferreira
- Departamento de Pediatría, Universidad Federal de Ciencias, Porto Alegre, Brasil
| | - P A Nacif
- Servicio de Gastroenterología, Centro Hospitalario Pereira Rossel (CHPR), Montevideo, Uruguay
| | - R Vázquez-Frías
- Departamento de Gastroenterología y Nutrición, Hospital Infantil de México Federico Gómez, Ciudad de México, México
| | - S Bravo
- Hospital de Niños Víctor J. Vilela, Rosario (Santa Fe), Argentina
| | | | - M Mejía-Castro
- Centro de Gastroenterología Endoscopia y Nutrición Pediátrica, Managua, Nicaragua
| | - M Orsi
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J Amil-Díaz
- Departamento de Pediatría Médica, Hospital de Sao Joao, Oporto, Portugal
| | - V Busoni
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J Cohen-Sabban
- Servicio de Gastroenterología, Hepatología y Trasplante Hepatointestinal Infantil, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - F J Martin-Capri
- Servicio de Gastroenterología, Hepatología y Nutrición Pediátrica, Hospital Sant Joan de Déu, Esplugues de Llobregat (Barcelona), España
| | - R Zablah
- Servicio de Gastroenterología Pediátrica, Hospital Nacional de Niños Benjamín Bloom, San Salvador, El Salvador
| | - M G Rodríguez-Guerrero
- Servicio de Gastroenterología Pediátrica, Hospital de Niños José Manuel de los Ríos, Caracas, Venezuela
| | - V L Sdepanian
- Departamento de Pediatría, Universidad Federal de São Paulo, São Paulo, Brasil
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El Mouzan M, Alahmadi N, ALSaleeem KA, Assiri A, AlSaleem B, Al Sarkhy A. Prevalence of nutritional disorders in Saudi children with inflammatory bowel disease based on the national growth reference. Arab J Gastroenterol 2020; 21:179-182. [PMID: 32798189 DOI: 10.1016/j.ajg.2020.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 04/28/2020] [Accepted: 07/09/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND STUDY AIM The prevalence of nutritional disorders in Saudi children with inflammatory bowel diseases (IBDs) has been reported using the World Health Organization (WHO) reference. Our aim was to provide more accurate definition of the prevalence of nutritional impairment in Saudi children with IBDs based on the national growth reference and to demonstrate the effect of using a reference from other populations on the prevalence rates. PATIENTS AND METHODS Weight, height, and body mass index data, from the multicenter study of IBDs in Saudi children and adolescents, were plotted on the new Saudi national growth reference. Statistical analyses included frequency calculations and z-test for proportions to investigate the significance of the difference in prevalence. A p-value of < 0.05 was considered significant. RESULTS Among a total of 374 patients, 119 (32%) had ulcerative colitis (UC) and 255 (68%) had Crohn's disease (CD). Compared with the WHO reference, the Saudi national reference produced a significantly lower prevalence of thinness in patients with UC (24% vs. 8%, p = 0.001), CD (35% vs. 20%, p = 0.002), and of short stature in patients with CD (28% vs. 11%, p < 0.001). The difference in the prevalence of overweight was not significant. CONCLUSIONS We provide more accurate prevalence estimate of nutritional disorders in Saudi children with IBDs based on national reference. The use of the WHO reference overestimated the prevalence of thinness and short stature in Saudi children. Prevalence estimates based on references from other populations should be interpreted with caution.
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Affiliation(s)
- Mohammad El Mouzan
- Department of Paediatrics, Gastroenterology Unit, Head Paediatric IBD Research Group, King Saud University, Riyadh, Saudi Arabia.
| | - Najat Alahmadi
- Maternity & Children Hospital, Ministry of Health. Almadina Almonawarh, Saudi Arabia
| | - Khalid A ALSaleeem
- Department of Paediatrics, Head Section of Paediatric Gastroenterology, King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia.
| | - Asaad Assiri
- Department of Paediatrics and Prince Abdullah Bin Khalid Coeliac Disease Research Chair, King Saud University. Riyadh, Saudi Arabia
| | - Badr AlSaleem
- Division of Gastroenterology, The Children Hospital, King Fahad Medical City, Pediatric Intestinal Failure and Parenteral Nutrition Program, Riyadh, Saudi Arabia.
| | - Ahmed Al Sarkhy
- Department of Paediatrics, Gastroenterology Unit, Head Paediatric IBD Research Group, King Saud University, Riyadh, Saudi Arabia
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Ghanadi K, Valizadeh J, Hasanvand A. Epidemiological and clinical aspects of ulcerative colitis in west of Iran: a cross sectional study. SPRINGERPLUS 2016; 5:1588. [PMID: 27652161 PMCID: PMC5025405 DOI: 10.1186/s40064-016-3248-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 09/07/2016] [Indexed: 12/22/2022]
Abstract
Introduction One of the forms of inflammatory bowel disease (IBD) that causes inflammation and ulcers in colon is ulcerative colitis (UC). This study was aimed to determine the epidemiological and clinical aspects of patients with ulcerative colitis in the west of Iran. Methods In this cross sectional study, we evaluated 150 patients with definite diagnosis of UC who referred to a subspecialty gastroenterology clinic in Khorramabad, Iran. The study was performed from May 2014 to August 2015 by using census method. Demographic characteristics as well as patients’ clinical profiles were extracted using a checklist. Disease severity was determined by the Truelove and Witt’s classification of ulcerative colitis (UC). Data were analyzed using SPSS software, version 17 for windows (IBM Inc., NY, US). Results A total of 150 patients with definite diagnosis of UC were analyzed, including 84 (56 %) women and 66 (44 %) men (male/female ratio = 1.27). The mean age of patients was 33.7 ± 12.5 years with an age range of 17–98 years. The age of the majority of patients was 20–29 and most of them (56 %) were women and living in urban areas (70.7 %). The most common site of the involvement in colon was rectosigmoid (66 patients, 44 %). Severity of the disease was mild in 36 patients (24.1 %), moderate and severe in 74 and 40 patients (49.3 and 26.6 %), respectively. The most common clinical manifestation of the patients was dysentery (68 %) and then rectorrhagia (60 %). Only 12 of all patients (7.8 %) mentioned a positive family history of IBD in their first degree kinfolks. Ten patients (6.7 %) had a history of regular smoking and four of them (2.6 %) mentioned a history of appendectomy. Four patients (5.3 %) had a positive history of smoking by their mothers during their pregnancy. Conclusion The results of this study demonstrate differences and similarities in demographic and clinical characteristics of UC in this part of Iran in comparison to other parts of the country.
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Affiliation(s)
- Koroush Ghanadi
- Gastroenterology and Hepatology, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Javad Valizadeh
- Student Research Committee, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Afshin Hasanvand
- Student Research Committee, Lorestan University of Medical Sciences, Khorramabad, Iran
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Abstract
BACKGROUND The objectives of this multicenter national study were to compare the clinical phenotype of early-onset inflammatory bowel disease (IBD) (EO-IBD) with IBD in older children and to examine whether there is any variability in consanguinity rate and familial aggregation in EO-IBD compared with later onset IBD. METHODS A retrospective analysis was performed on children aged 0 to 14 years with IBD in 17 centers located in geographically distinct regions in Saudi Arabia, from 2003 to 2012. Data of patients with EO-IBD (0 to <6 yrs) were compared with those with later onset IBD (6-14 yrs). Moreover, we evaluated differences in clinical pattern of infantile or toddler onset IBD subgroup (0-3 yr) as compared with those presenting in older children. RESULTS Of 352 IBD patients identified during the 10-year study period, 76 children (21.6%) younger than 6 years were diagnosed with IBD. Among the Crohn's disease (CD) group, infantile or toddler onset CD subgroup showed a more frequent isolated colonic involvement (L2) than later-onset group (57% versus 20%; P = 0.002). Positive family history was significantly more common in the infantile or toddler onset ulcerative colitis subgroup (29.4% versus 4.2% in later onset ulcerative colitis; P < 0.0001). The consanguinity rate was significantly higher in the infantile or toddler onset CD subgroup as compared with later onset CD group (57.1% versus 25.3%; P = 0.04). CONCLUSIONS In conclusion, EO-IBD exhibits a unique clinical phenotype with a strikingly higher familial aggregation in early-onset ulcerative colitis. Our data suggest a significant genetic impact on the onset of CD in the very young children.
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Abstract
BACKGROUND The objective of this study was to measure the prevalence of inflammatory bowel disease (IBD) among patients with autism spectrum disorders (ASD), which has not been well described previously. METHODS The rates of IBD among patients with and without ASD were measured in 4 study populations with distinct modes of ascertainment: a health care benefits company, 2 pediatric tertiary care centers, and a national ASD repository. The rates of IBD (established through International Classification of Diseases, Ninth Revision, Clinical Modification [ICD-9-CM] codes) were compared with respective controls and combined using a Stouffer meta-analysis. Clinical charts were also reviewed for IBD among patients with ICD-9-CM codes for both IBD and ASD at one of the pediatric tertiary care centers. This expert-verified rate was compared with the rate in the repository study population (where IBD diagnoses were established by expert review) and in nationally reported rates for pediatric IBD. RESULTS In all of case-control study populations, the rates of IBD-related ICD-9-CM codes for patients with ASD were significantly higher than that of their respective controls (Stouffer meta-analysis, P < 0.001). Expert-verified rates of IBD among patients with ASD were 7 of 2728 patients in one study population and 16 of 7201 in a second study population. The age-adjusted prevalence of IBD among patients with ASD was higher than their respective controls and nationally reported rates of pediatric IBD. CONCLUSIONS Across each population with different kinds of ascertainment, there was a consistent and statistically significant increased prevalance of IBD in patients with ASD than their respective controls and nationally reported rates for pediatric IBD.
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Abstract
BACKGROUND Among 10 provinces in Canada, Québec has the second highest incidence of Crohn's disease (CD), based on data collected more than a decade ago. To date, there are no reports on the occurrence of ulcerative colitis (UC) and no updates on the occurrence of CD in Québec. We sought to describe trends in the annual incidence and prevalence of inflammatory bowel disease in Québec during 2001 to 2008. METHODS A population-based retrospective cohort study was conducted using the administrative health databases of Québec. IBD cases were identified using a validated case definition requiring at least 1 hospitalization or 4 physician claims within a 2-year period. Incident cases were defined as individuals who had been free of inflammatory bowel disease for at least 2 years before the 2-year time span of the case definition. RESULTS We identified 24,377 CD and 15,346 UC cases. The mean age at diagnosis was 39 and 46 years for CD and UC, respectively. There was a significant decline in the annual incidence from 2001 to 2008 for both CD (P < 0.003) and UC (P < 0.001). No significant change with time was found in pediatric cases. The point prevalence in 2008 was 277 CD and 164 UC cases per 100,000 population. The average incidence was 17.4 CD cases per 100,000 person-years and 10.1 UC cases per 100,000 person-years. There was no predominance of urban or rural cases for either CD or UC. CONCLUSIONS During 2001 to 2008, annual incidence for both CD and UC declined in Québec. There was no significant change with time in incidence for pediatric cases.
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Abstract
BACKGROUND Pediatric inflammatory bowel disease (IBD) is increasingly recognized in developing countries; however, the incidence and trend over time have not been reported. METHODS This retrospective study included children diagnosed with IBD in gastroenterology centers in the Kingdom of Saudi Arabia between 2003 and 2012. The date of birth, date and age at diagnosis, gender, and final diagnosis were collected on special forms. Clinical, laboratory, imaging, endoscopy, and histopathology results were reviewed to confirm the final diagnosis. Descriptive statistics were used to compare ulcerative colitis and Crohn's disease in different age groups, and significance was assessed by the chi-square test. Incidence rates and trend over time were analyzed with the assumption of Poisson distribution. The incidence rate over time was compared in 2 periods (2003-2007 and 2008-2012). A P value of <0.05 and 95% confidence intervals were used to assess the significance and precision of the estimates. RESULTS A total of 340 Saudi Arabian children aged 0 to 14 years were diagnosed. The mean incidence rate per 100,000 individuals was 0.2, 0.27, and 0.47 for ulcerative colitis, Crohn's disease, and IBD, respectively. Except for the 0- to 4-year age group, there was a significant increase in incidence over time. CONCLUSIONS Although the incidence of pediatric IBD in Saudi Arabian children is lower than suggested in the Western literature, there is a significantly increasing trend over time. However, decreased trend in the younger age group over time is identified. Prospective studies will be important to identify the risk factors for IBD in different age groups.
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Abstract
OBJECTIVE The aim of the present study was to investigate the relation between consanguinity and inflammatory bowel diseases (IBD). METHODS Review of the medical records of children with a final diagnosis of IBD to determine age, sex, and type of IBD, supplemented by information on consanguinity and family history (FH) of IBD in relatives. There were 138 children, ages 1.4 to 19.3 years, and 50% were girls. RESULTS The prevalence of consanguinity was 50%, 53%, 39% and 60% in IBD, Crohn disease (CD), ulcerative colitis (UC), and controls, respectively. There was a significantly higher prevalence of consanguinity in controls than in patients with IBD and UC (P = 0.02 and 0.026, respectively), whereas the difference between CD patients and controls was not significant (P = 0.20). The prevalence of first cousin consanguinity was 71%, 73.2%, 61.5% and 70.5% in patients with IBD, CD, UC, and controls, respectively, indicating no significant difference between these conditions and controls (P = 0.95, P = 0.78, P = 0.33, respectively). There was no significant difference in the prevalence of consanguinity in the parents of children with or without a FH of either CD (P = 0.89) or UC (P = 0.32). CONCLUSIONS There is no significant relation between parental consanguinity and IBD in this population, especially when there is no FH of disease, suggesting reduced genetic susceptibility; however, further studies including larger sample size and details of FH of consanguinity and IBD in multiple generations are needed for further definitions of the role of consanguinity.
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Benchimol EI, Fortinsky KJ, Gozdyra P, Van den Heuvel M, Van Limbergen J, Griffiths AM. Epidemiology of pediatric inflammatory bowel disease: a systematic review of international trends. Inflamm Bowel Dis 2011; 17:423-39. [PMID: 20564651 DOI: 10.1002/ibd.21349] [Citation(s) in RCA: 675] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Temporal trends in the incidence of pediatric-onset inflammatory bowel disease (IBD) are controversial and a wide range of estimates have been reported worldwide. We conducted a systematic review of research describing the epidemiology of childhood-onset IBD to assess changes in incidence rates over time and to evaluate international differences. METHODS The following electronic databases were searched for articles published 1950-2009: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Cochrane IBD/Functional Bowel Disorders Group Specialised Trial Register. All included studies reported incidence or prevalence of IBD, Crohn's disease (CD) or ulcerative colitis (UC). Two authors independently completed the data extraction form for each eligible study. Choropleth maps demonstrated the international incidence of IBD, CD, and UC. Incidence of CD and UC was graphed using data from studies reporting rates in multiple time periods. RESULTS The search yielded 2209 references and review resulted in 139 included studies from 32 countries. A wide range of incidence was reported internationally; however, rates of IBD were not described in most countries. Twenty-eight studies (20.1%) used statistical analysis to assess trends over time, and 77.8% reported statistically significantly increased incidence of pediatric IBD. Of studies calculating statistical trends in CD incidence, 60% reported significantly increased incidence. Of similar UC studies, 20% reported significantly increased incidence. CONCLUSIONS Globally rising rates of pediatric IBD (due primarily to the rising incidence of CD) was demonstrated in both developed and developing nations; however, most countries lack accurate estimates. Analyzing incidence trends may help identify specific environmental and genetic risk factors for pediatric IBD.
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