Abstract
In patients with Los Angeles (LA) grade C or D oesophagitis, a positive relationship has been established between the duration of intragastric acid suppression and healing. To determine whether there is an apparent optimal time of intragastric acid suppression for maximal healing of reflux oesophagitis. Post hoc analysis of data from a proof-of-concept, double-blind, randomized study of 134 adult patients treated with esomeprazole (10 or 40 mg od for 4 weeks) for LA grade C or D oesophagitis. A curve was fitted to pooled 24-h intragastric pH (day 5) and endoscopically assessed healing (4 weeks) data using piecewise quadratic logistic regression. Maximal reflux oesophagitis healing rates were achieved when intragastric pH >4 was achieved for approximately 50-70% (12-17 h) of the 24-h period. Acid suppression above this threshold did not yield further increases in healing rates. After 4 weeks' acid-suppressive therapy for LA grade C or D oesophagitis, successful healing appears to reach a threshold above which improvements are unlikely to be achieved despite an increase in number of hours with intragastric pH >4.
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