Epidemiology of Gastroesophageal Reflux Disease in Asia: A Systematic Review

Ethnic and geographical differences are important factors in studying disease frequencies, because they may highlight the environmental or genetic influences in the etiology. We retrieved the studies which have been published regarding the epidemiologic features of gastroesophageal reflux disease (GERD) in Asia, based on the definitions of GERD, study settings, publication years and geographical regions. From the population-based studies, the prevalence of symptom-based GERD in Eastern Asia was found to be 2.5%-4.8% before 2005 and 5.2%-8.5% from 2005 to 2010. In Southeast and Western Asia, it was 6.3%-18.3% after 2005, which was much higher than those in Eastern Asia. There were robust epidemiologic data of endoscopic reflux esophagitis in medical check-up participants. The prevalence of endoscopic reflux esophagitis in Eastern Asia increased from 3.4%-5.0% before 2000, to 4.3%-15.7% after 2005. Although there were only limited studies, the prevalence of extra-esophageal syndromes in Asia was higher in GERD group than in controls. The prevalence of Barrett's esophagus was 0.06%-0.84% in the health check-up participants, whereas it was 0.31%-2.00% in the referral hospital settings. In summary, the prevalence of symptom-based GERD and endoscopic reflux esophagitis has increased in Asian countries. However, the prevalence of Barrett's esophagus in Asia has not changed and also still rare

Non-invasive diagnostic tests for Helicobacter pylori infection

BACKGROUND: Helicobacter pylori (H pylori) infection has been implicated in a number of malignancies and non-malignant conditions including peptic ulcers, non-ulcer dyspepsia, recurrent peptic ulcer bleeding, unexplained iron deficiency anaemia, idiopathic thrombocytopaenia purpura, and colorectal adenomas. The confirmatory diagnosis of H pylori is by endoscopic biopsy, followed by histopathological examination using haemotoxylin and eosin (H & E) stain or special stains such as Giemsa stain and Warthin-Starry stain. Special stains are more accurate than H & E stain. There is significant uncertainty about the diagnostic accuracy of non-invasive tests for diagnosis of H pylori. OBJECTIVES: To compare the diagnostic accuracy of urea breath test, serology, and stool antigen test, used alone or in combination, for diagnosis of H pylori infection in symptomatic and asymptomatic people, so that eradication therapy for H pylori can be started. SEARCH METHODS: We searched MEDLINE, Embase, the Science Citation Index and the National Institute for Health Research Health Technology Assessment Database on 4 March 2016. We screened references in the included studies to identify additional studies. We also conducted citation searches of relevant studies, most recently on 4 December 2016. We did not restrict studies by language or publication status, or whether data were collected prospectively or retrospectively. SELECTION CRITERIA: We included diagnostic accuracy studies that evaluated at least one of the index tests (urea breath test using isotopes such as13C or14C, serology and stool antigen test) against the reference standard (histopathological examination using H & E stain, special stains or immunohistochemical stain) in people suspected of having H pylori infection. DATA COLLECTION AND ANALYSIS: Two review authors independently screened the references to identify relevant studies and independently extracted data. We assessed the methodological quality of studies using the QUADAS-2 tool. We performed meta-analysis by using the hierarchical summary receiver operating characteristic (HSROC) model to estimate and compare SROC curves. Where appropriate, we used bivariate or univariate logistic regression models to estimate summary sensitivities and specificities. MAIN RESULTS: We included 101 studies involving 11,003 participants, of which 5839 participants (53.1%) had H pylori infection. The prevalence of H pylori infection in the studies ranged from 15.2% to 94.7%, with a median prevalence of 53.7% (interquartile range 42.0% to 66.5%). Most of the studies (57%) included participants with dyspepsia and 53 studies excluded participants who recently had proton pump inhibitors or antibiotics.There was at least an unclear risk of bias or unclear applicability concern for each study.Of the 101 studies, 15 compared the accuracy of two index tests and two studies compared the accuracy of three index tests. Thirty-four studies (4242 participants) evaluated serology; 29 studies (2988 participants) evaluated stool antigen test; 34 studies (3139 participants) evaluated urea breath test-13C; 21 studies (1810 participants) evaluated urea breath test-14C; and two studies (127 participants) evaluated urea breath test but did not report the isotope used. The thresholds used to define test positivity and the staining techniques used for histopathological examination (reference standard) varied between studies. Due to sparse data for each threshold reported, it was not possible to identify the best threshold for each test.Using data from 99 studies in an indirect test comparison, there was statistical evidence of a difference in diagnostic accuracy between urea breath test-13C, urea breath test-14C, serology and stool antigen test (P = 0.024). The diagnostic odds ratios for urea breath test-13C, urea breath test-14C, serology, and stool antigen test were 153 (95% confidence interval (CI) 73.7 to 316), 105 (95% CI 74.0 to 150), 47.4 (95% CI 25.5 to 88.1) and 45.1 (95% CI 24.2 to 84.1). The sensitivity (95% CI) estimated at a fixed specificity of 0.90 (median from studies across the four tests), was 0.94 (95% CI 0.89 to 0.97) for urea breath test-13C, 0.92 (95% CI 0.89 to 0.94) for urea breath test-14C, 0.84 (95% CI 0.74 to 0.91) for serology, and 0.83 (95% CI 0.73 to 0.90) for stool antigen test. This implies that on average, given a specificity of 0.90 and prevalence of 53.7% (median specificity and prevalence in the studies), out of 1000 people tested for H pylori infection, there will be 46 false positives (people without H pylori infection who will be diagnosed as having H pylori infection). In this hypothetical cohort, urea breath test-13C, urea breath test-14C, serology, and stool antigen test will give 30 (95% CI 15 to 58), 42 (95% CI 30 to 58), 86 (95% CI 50 to 140), and 89 (95% CI 52 to 146) false negatives respectively (people with H pylori infection for whom the diagnosis of H pylori will be missed).Direct comparisons were based on few head-to-head studies. The ratios of diagnostic odds ratios (DORs) were 0.68 (95% CI 0.12 to 3.70; P = 0.56) for urea breath test-13C versus serology (seven studies), and 0.88 (95% CI 0.14 to 5.56; P = 0.84) for urea breath test-13C versus stool antigen test (seven studies). The 95% CIs of these estimates overlap with those of the ratios of DORs from the indirect comparison. Data were limited or unavailable for meta-analysis of other direct comparisons. AUTHORS' CONCLUSIONS: In people without a history of gastrectomy and those who have not recently had antibiotics or proton ,pump inhibitors, urea breath tests had high diagnostic accuracy while serology and stool antigen tests were less accurate for diagnosis of Helicobacter pylori infection.This is based on an indirect test comparison (with potential for bias due to confounding), as evidence from direct comparisons was limited or unavailable. The thresholds used for these tests were highly variable and we were unable to identify specific thresholds that might be useful in clinical practice.We need further comparative studies of high methodological quality to obtain more reliable evidence of relative accuracy between the tests. Such studies should be conducted prospectively in a representative spectrum of participants and clearly reported to ensure low risk of bias. Most importantly, studies should prespecify and clearly report thresholds used, and should avoid inappropriate exclusions

Endoscopic treatment of biliary leak following gunshot injury: A case report

This report describes the endoscopic treatment of a biliary leak, following a gunshot injury to the liver of a young Saudi female. She was admitted to the emergency unit having sustained an accidental gunshot on the upper part of her right shoulder when her spouse was maintaining his gun sitting on a higher level chair. She was intubated and immediately taken for exploratory laparotomy, which revealed right liver lobe laceration and significant hemoperitoneum. Bleeding was controlled surgically, and two peritoneal lavage catheters were inserted for drainage. However, about 300–400 ml of bile drainage was observed daily. Accordingly, endoscopic retrograde cholangiopancreatography (ERCP) was performed, which demonstrated a biliary leak. Sphincterotomy was performed and a stent was inserted, following which the biliary leak eventually subsided. A follow-up ERCP was performed 10 weeks later, and no further leak was observed. This is the first case report of a successful endoscopic treatment of traumatic biliary injuries due to a gun shot in Saudi Arabia. ERCP is a valuable method in the treatment of a traumatic bile leak. This report describes the endoscopic treatment of a biliary leak following a gunshot injury in a young Saudi female. She was admitted to the emergency unit having sustained an accidental gunshot on the upper part of her right shoulder when her spouse was maintaining his gun sitting on a higher level chair. She was intubated and immediately taken for exploratory laparotomy, which revealed right liver lobe laceration and significant hemoperitoneum. Bleeding was controlled surgically, and two peritoneal lavage catheters were inserted for drainage. However, about 300–400 ml of bile drainage was observed daily. Accordingly, endoscopic retrograde cholangiopancreatography (ERCP) was performed, which demonstrated a biliary leak. Sphincterotomy was performed and a stent was inserted, following which bile drainage gradually reduced, and stopped after 5 days. A follow-up ERCP was performed 10 weeks later, and no further leak was observed. This is the first case report of a successful endoscopic treatment of traumatic biliary injury due to a gunshot in Saudi Arabia. ERCP is a valuable method in the treatment of a traumatic bile leak

Hepatitis B and C viral infections in Tihamet Aseer, south-western Saudi Arabia: Are there gender differences?

Background: Hepatitis B virus (HBV) infection is endemic in Saudi Arabia. Many studies have shown varying results in gender differences in HBV and hepatitis C virus (HCV) infection. The objective of this study was to determine if gender differences exist in HBV and HCV infection and to elucidate any related risk factors in Tihamet Aseer, south-western Saudi Arabia. Materials and Methods: The study was a cross-sectional study of a representative sample of males and females in Tihamet Aseer, south-western Saudi Arabia. A comprehensive questionnaire was completed by all participants. Blood samples were taken and sera were tested for hepatitis B surface antigen and HCV antibodies by fourth-generation enzyme immunoassays. Results: The study included 1532 participants from the Tihamet Aseer area. An overall seroprevalence of 7.9% and 1.7% was found for HBV and HCV infections, respectively. In logistic regression analysis, no gender differences were found for HBV seroprevalence. Identified risk factors for HBV infection included a history of blood transfusion and lack of hepatitis B vaccination. On the other hand, females were more prone to become seropositive for HCV (adjusted odds ratio = 5.034, 95% confidence interval: 1.042–9.321). Other identified risk factors for HCV infection were illiteracy and a history of blood transfusion. Conclusion: The prevalence and HBV and HCV infection is high compared to the national figures. Gender differences were only observed in HCV infection. It is recommended to have an active educational and media campaign. A “catch-up” vaccination program against HBV should be introduced for adults as a strategy to achieve the herd immunity effect in the affected area

Use of serum immunoglobulins G and A for detection of <i> Helicobacter pylori </i> infection in dyspeptic patients by enzyme immunosorbent assay

Since the discovery of Helicobacter pylori (H. pylori), several invasive and non invasive tests have become available. The aim of this study was to test the performance of immunoglobulins IgG and IgA by using an enzyme linked immunosorbent assay (ELISA) test (In vitro diagnostika GmbH, Germany) for the diagnosis of H. pylori among dyspeptic patients. Blood samples from 152 dyspeptic patients and 51 asymptomatic controls were analyzed in a case control study. IgG and IgA were positive in 33.5&#x0025; and 41.1&#x0025; respectively compared to 13.8&#x0025; for both IgG and IgA in controls (P=0.002). We support the future use of serology as a non invasive, and rapid test for the diagnosis of H. pylori infection among dyspeptic patients in areas with low prevalence. Endoscopy remains the method of choice for elderly dyspeptic patients and for those with possible gastric or duodenal pathology

Pattern of helicobacter pylori sensitivity to various antimicrobial agents

To evaluate the pattern of Helicobacter pylori (<i> H. pylori</i> ) susceptibility to different antimicrobial agents, we prospectively studied 45 <i> H. pylori</i> isolates by disc diffusion method. These isolates were obtained from patients aged between 16-75 years, of both sexes who had no prior history of metronidazole ingestion. A total of 45 patients were included, of which 36 were males with a mean age of 42.9 years and nine females with a mean age of 36.4 years, 62&#x0025; of patients were Saudis. Almost all the <i>H. pylori</i> isolates were susceptible to clarithromycin, penicillin, erythromycin, ampicillin, tetracycline, clindamycin and cephradine. However, 64.4&#x0025; of the isolates were resistant to metronidazole. No significant difference was found either in susceptibility of isolates from Saudi, non-Saudi or male and female patients

The changing pattern of upper gastro-intestinal lesions in southern Saudi Arabia: An endoscopic study

<b>Background/Aim:</b> Dyspepsia is a common gastrointestinal disorder and is the most common indication for upper gastrointestinal endoscopy (UGIE). In recent years, it has been observed in several centers that there is a change in the causes of dyspepsia as revealed by UGIE. Our main objectives were: (1) To study the pattern of upper gastrointestinal pathology in patients with dyspepsia undergoing upper endoscopy; (2) Compare that with the pattern seen 10-15 years earlier in different areas of KSA.<b> Materials and Methods:</b> Retrospective study of all UGI endoscopies performed at Aseer Central Hospital, Abha, Southern Saudi Arabia during the years 2005-2007 on patients above 13 years of age. Patients who underwent UGIE for reasons other than dyspepsia were excluded. The analysis was performed using the SPSS 14 statistical package. <b> Results:</b> A total of 1,607 patients underwent UGI endoscopy during the three-year study period (age range, 15-100). There were 907 males (56.4&#x0025;) and 700 female (43.6&#x0025;). Normal findings were reported on 215 patients (14&#x0025;) and the majority had gastritis (676 = 42&#x0025;), of whom 344 had gastritis with ulcer disease. Moreover, 242 patients (15&#x0025;) had gastro-esophageal reflux (GERD), with or without esophagitis or hiatus hernia. Also, a total of 243 patients had duodenal ulcer (DU) (15&#x0025;) while only 12 had gastric ulcer (0.7&#x0025;). <b> Discussion and Conclusion: </b> There is clear change in the frequency of UGIE lesions detected recently compared to a decade ago with an increasing prevalence of reflux esophagitis and hiatus hernia. This could be attributed to changes in lifestyle and dietary habits such as more consumption of fat and fast food, increased prevalence of obesity, and smoking. These problems should be addressed in order to minimize the serious complications of esophageal diseases

Experience of Basic Life Support among King Khalid University Health Profession Students, Southwestern Saudi Arabia

Background: Satisfactory experience about basic life support (BLS) is crucial to ensure rapid and efficient delivery of essential life-saving care during emergency situations. Objectives: To assess BLS experience among health profession students at King Khalid University (KKU), Southwestern Saudi Arabia. Methods: A cross-sectional study was conducted on a representative sample of male and female health profession students, during the academic year 2019&ndash;2020. A self-reported questionnaire was utilized to collect data about BLS experiences, which included receiving BLS training, reasons for not having BLS training, suggestions to improve BLS training, encountering a situation that required the use of BLS, practicing BLS when needed and reasons for not practicing BLS when needed. Results: Out of 1261 health profession students, 590 received formal BLS training with a prevalence rate of 46.8% (95% CI: 44.0&ndash;49.6), and 46.0% of them trained at the university. Important obstacles for non-attendance included busy academic schedule (54.7%) and high cost of the training course (18%). Overall, 84.1% supported integration of BLS training into their college curricula. Almost 26% encountered a situation that required BLS; however, only 32.4% responded. Through multivariate regression, the significant determinant of response was having formal BLS training (aOR = 4.24, 95% CI: 2.38&ndash;7.54). The frequent reasons for non-response were lack of adequate BLS knowledge (35.0%), nervousness (22.8%), and that the victim was of opposite sex (9.0%). Conclusion: It is recommended that more emphasis should be given to BLS training among undergraduates of health profession colleges in Southwestern Saudi Arabia. It is recommended that BLS training be integrated into health profession college curricula. Including BLS training as a graduation requirement for health profession students might motivate students to attain BLS training courses