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The 15 g D-xylose absorption test: its application to the study of coeliac disease.
  1. F M Stevens,
  2. D W Watt,
  3. M A Bourke,
  4. B McNicholl,
  5. P F Fottrell,
  6. C F McCarthy


    The absorption of xylose following an oral load of 15 g D-xylose has been studied by serial blood levels in 17 untreated adult coeliac patients, 21 treated coeliac patients, and 30 non-coeliac patients. A statistically significant difference in xylose blood levels was found between untreated coeliac and non-coeliac patients at all the times studied, but a complete separation between these two groups occurred only at the 75 minute stage. The reproducibility of absorption was assessed by repeating the test in 16 subjects. The 95% confidence limits of the standard error of estimate are narrowest at 75 and 90 minutes.

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