caa a22 4500 445888024 CHVBK 20180317145605.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00535-011-0429-3 doi (NATIONALLICENCE)springer-10.1007/s00535-011-0429-3 Systematic review of the epidemiology of gastroesophageal reflux disease in Japan [Elektronische Daten] [Yoshikazu Kinoshita, Kyoichi Adachi, Michio Hongo, Ken Haruma] Background: Epidemiological studies of gastroesophageal reflux disease (GERD) in Japan vary in design. This systematic review examines the prevalence of GERD in Japan, distinguishing between study methodologies, and reports on changes over time and factors potentially associated with GERD. Methods: PubMed and Embase searches identified studies reporting the prevalence of GERD in the general population, primary care patients, and individuals undergoing routine health checks. Results: Of the twenty eligible studies, half excluded individuals taking acid-suppressive medication, so these studies would have been likely to have underestimated the prevalence by 2-3%. Nine studies reported the prevalence of at least weekly reflux symptoms (the definition closest to the Montreal definition): in seven studies this was 6.5-9.5%, but in two studies that included individuals who underwent upper gastrointestinal endoscopy the prevalence was 19.0 and 21.8%. Eight studies used symptom scores: prevalence estimates ranged from 10.2 to 29.0% in five studies using the Carlsson-Dent self-administered questionnaire (QUEST), and from 27.0 to 37.6% in three studies using the frequency scale for the symptoms of GERD. Prevalence estimates were 15.1-24.3% in three studies that reported the presence of reflux symptoms of undefined frequency. Six studies reported the prevalence of reflux esophagitis as 4.9-8.2%. Changes in prevalence over time and factors associated with reflux symptoms were inconsistent. Conclusions: Few studies have reported the prevalence of GERD in Japan using standardized criteria. Thus, prevalence estimates vary substantially, reflecting differences in study populations and GERD definitions. However, seven studies reported that the prevalence of at least weekly symptoms was 6.5-9.5%, a finding which approaches that reported in Western populations (10-20%). Springer, 2011 Japan nationallicence Gastroesophageal reflux disease nationallicence Prevalence nationallicence Epidemiology nationallicence BMI : Body mass index nationallicence 95% CI : 95% confidence interval nationallicence FSSG : Frequency scale for the symptoms of GERD nationallicence GERD : Gastroesophageal reflux disease nationallicence LA : Los Angeles nationallicence OR : Odds ratio nationallicence QUEST : Carlsson-Dent self-administered questionnaire nationallicence Kinoshita Yoshikazu Shimane University Faculty of Medicine, 89-1 Enya-cho, 693-8501, Izumo, Shimane, Japan aut Adachi Kyoichi Shimane University Faculty of Medicine, 89-1 Enya-cho, 693-8501, Izumo, Shimane, Japan aut Hongo Michio Tohoku University Hospital, Aoba, Sendai, Japan aut Haruma Ken Kawasaki Medical School, Kurashiki, Okayama, Japan aut Journal of Gastroenterology Springer Japan 46/9(2011-09-01), 1092-1103 0944-1174 46:9<1092 2011 46 535 https://doi.org/10.1007/s00535-011-0429-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00535-011-0429-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kinoshita Yoshikazu Shimane University Faculty of Medicine, 89-1 Enya-cho, 693-8501, Izumo, Shimane, Japan aut NATIONALLICENCE 700 1- Adachi Kyoichi Shimane University Faculty of Medicine, 89-1 Enya-cho, 693-8501, Izumo, Shimane, Japan aut NATIONALLICENCE 700 1- Hongo Michio Tohoku University Hospital, Aoba, Sendai, Japan aut NATIONALLICENCE 700 1- Haruma Ken Kawasaki Medical School, Kurashiki, Okayama, Japan aut NATIONALLICENCE 773 0- Journal of Gastroenterology Springer Japan 46/9(2011-09-01), 1092-1103 0944-1174 46:9<1092 2011 46 535 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer