Acid secretion in both basal and stimulated states (using augmented
histalog test) was studied in 31 normal control patients, 64
duodenal ulcer patients and 101
gastric ulcer patients. Having had the result of
acid output study, the 64 DU patients could be classified according to their
acid secretion results
as 35 DU type I or Normosecretor (54.7%) and 29 DU type II or Hypersecretor (45.3%). For the GU patients which were classified according to the sites of lesions as GU type I (GU above angulus), GU type II (GU associated with DU) and GU type III (GU below the angulus). Their
acid output study showed that the GU type I had a rather low BAO and a high
MAO close to that of the Normosecretor, but the GU type II and III had their BAO and
MAO significantly higher than that of the normal control and close to that of the Hypersecretor. Comparison of
acid secretion in this study group to other racial groups showed that the Thai population had
acid secretion patterns close to other Asian populations, except that the Chinese in Singapore had a higher proportion of Normosecretor (69.0%) than Hypersecretor (31%). The
MAO of the Asian population was found to be lower than that of Europeans.