Table 1

Characteristics of the individual studies and the overall association between Helicobacter pylori and gastric cancer

  • 1-150 Interval between collection of blood sample used forH pylori serology and cancer diagnosis.

  • 1-151 Odds ratios (OR) differ from published results due to changes in study sample (UK and California) and use of matching (China II). Published results are UK OR 2.77 (95% confidence interval (CI) 1.04–7.97)15 and OR 4.0 (1.9–8.2)23; California OR 3.6 (1.8–7.3)4; and China II OR 2.0 (1.3–3.2).24

  • 1-152 Unpublished data.

  • 1-153 Weighted by the number of cases per study to allow for different matching ratios.