Fig. 1From: Downward trend in the prevalence of Helicobacter pylori infections and corresponding frequent upper gastrointestinal diseases profile changes in Southeastern China between 2003 and 2012Linear regression analysis of H. pylori infection versus time (2003–2012). The calculated regression equation for the correlation of H. pylori infection (%) versus time in years from 2003 to 2012 was y = − 2.03x + 43.99Back to article page