Non-bismuth and bismuth quadruple therapies based on previous clarithromycin exposure are as effective and safe in an area of high clarithromycin resistance: A real-life study

Background: Bismuth quadruple (BQT) and non-bismuth quadruple (N-BQT) therapies are the recommended first-line treatments for Helicobacter (H.) pylori infection. Objective: To compare the efficacy of BQT and N-BQT in clinical practice in an area with high clarithromycin resistance, choosing the regimen on the basis of previous exposure to clarithromycin. Methods: A total of 404 consecutive Hpylori-positive, naïve patients were enrolled. A total of 203 patients without previous exposure to clarithromycin received N-BQT, 100 patients for 10days and 103 for 14days, whereas 201 with previous exposure to clarithromycin received 10-day BQT. Efficacy and treatment-related adverse events were assessed. Results and Conclusions: Eradication rates by intention-to-treat analysis were 88.2% for N-BQT and 91.5% for BQT (P=.26); per-protocol analysis eradication rates were 91.2% and 95.8% for N-BQT and BQT, respectively (P=.07). Eradication rates were significantly higher with 14-day than 10-day CT (P&nbsp