TABLE 3.

Reproducibility of H. pylori EIA test results according to age, sex, and ethnicity (n = 900)

Demographic feature	No. of samples	% Disagreement between initial and repeat test	P value
Age (yr)
20-39	388	3.4	0.80
40-59	217	3.2
≥60	295	3.7
Sex
Male	429	2.8	0.31
Female	471	4.0
Ethnicity
Non-Hispanic white	239	5.0	0.32
Non-Hispanic black	142	3.9
Mexican American	488	2.7
Other	21	0