Chi-Yang Chang

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BACKGROUND Whether sequential treatment can replace triple therapy as the standard treatment for Helicobacter pylori infection is unknown. We compared the efficacy of sequential treatment for 10 days and 14 days with triple therapy for 14 days in first-line treatment. METHODS For this multicentre, open-label, randomised trial, we recruited patients (≥20(More)
BACKGROUND Obesity has become a major health issue not only in the West but also in Asia. Morbid obesity can lead to much comorbidity and can markedly interfere with quality of life. The aim of this study was to compare the health-related quality of life (HRQL) between patients with morbid obesity coming for bariatric surgery and the healthy population in(More)
BACKGROUND Gastroesophageal reflux disease (GERD) has become a major health problem globally, affecting patients' health-related quality of life (HRQOL). Barrett's esophagus (BE) is a precancerous lesion associated with GERD. BE patients might not only suffer from HRQOL losses by GERD but also face psychological distress due to the increased risk of(More)
OBJECTIVE The Taiwan Government issued a policy to restrict antimicrobial usage since 2001. We aimed to assess the changes in the antibiotic consumption and the primary resistance of H. pylori after this policy and the impact of virulence factors on resistance. METHODS The defined daily dose (DDD) of antibiotics was analyzed using the Taiwan National(More)
—The out-band transmission zeros of the multilayer low-temperature co-fired ceramic bandpass filter are studied in this paper. The design target of this filter, with the passband between 2.3–2.65 GHz (the true application is 2.4–2.483 GHz), is to reject the local oscillator and image signals and, in the mean time, to suppress the harmonic frequency. This(More)
BACKGROUND Obesity has become a major worldwide public health issue. There is a need for tools to measure patient-reported outcomes. The Moorehead-Ardelt Quality of Life Questionnaire II (MA II) contains six items. The objective of this study was to translate the MA II into Chinese and validate it in patients with morbid obesity. METHODS The MA II was(More)
Early esophageal squamous cell neoplasias (ESCNs) are easily missed with conventional white-light endoscopy. This study aimed to assess whether early ESCNs have a spatial predilection and the patterns of recurrence after endoscopic treatment. We analyzed the circumferential and longitudinal location of early ESCNs, as well as their correlations with(More)
BACKGROUND Whether concomitant therapy is superior to bismuth quadruple therapy or 14-day triple therapy for the first-line treatment of Helicobacter pylori infection remains poorly understood. We aimed to compare the efficacy and safety of 10-day concomitant therapy, 10-day bismuth quadruple therapy, and 14-day triple therapy in the first-line treatment of(More)
BACKGROUND AND AIM The prevalence rates of Barrett's esophagus (BE) in western countries are higher than Asian ones, but little is known about their difference among risk factors of BE. The aim of this study is to investigate the associations of various risk factors including central obesity, body mass index (BMI), metabolic syndrome and H. pylori(More)
Radiofrequency ablation (RFA) and endoscopic submucosal dissection (ESD) can potentially be applied for early esophageal squamous cell neoplasia (ESCN); however, no study has directly compared these 2 modalities.We retrospectively enrolled the patients with flat-type "large" (length ≥3 cm extending ≥1/2 of the circumference of esophagus) early ESCNs treated(More)