Studies with the maximal histamine test.

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Abstract
Maximal acid output in Indian controls and subjects with duodenal ulcers is lower than that reported from the West. There is a significantly higher acid output in men than in women of comparable age and weight groups. After 50 years of age, there is a decrease in acid output in both sexes; no significant decline could be found in younger persons. There is an increase in acid output with increase of weight in both sexes which is more pronounced in females. Male smokers have a higher output than men who do not smoke, but the difference is not significant. There is no difference in acid output between vegetarians and non-vegetarians. All observations were made with the Kay augmented histamine test.