ANTONY R. UNWIN, M.D.
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To the editor: I was asked as a statistician to look at the paper by Rotter and colleagues (1) in your September 1979 issue. The medical side of the article was interesting, but I have had some doubts about the handling of data and presentation of results.
In Table 1 (p. 374) the definite hyperpepsinogenemic group includes 93 affected patients (that is, those with a duodenal ulcer or an elevated pepsinogen level, or both). In Table 2 (p. 375) subset 2 "is equivalent to the entire definite hyperpepsinogenemic group" but only includes 83 affected patients. What is the reason for
UNWIN AR. Statistical Assessment of Hyperpepsinogenemia Data. Ann Intern Med. ;93:377–378. doi: 10.7326/0003-4819-93-2-377_2
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Published: Ann Intern Med. 1980;93(2):377-378.
Gastroenterology/Hepatology, Peptic Disease, Peptic Ulcer.
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