Numbers and relative standardised incidence ratios (RR and 95% CI) of oesophageal cancer in Helicobacter pylori (Hp) antibody (HpAb) positive and negative middle-age men from two cities followed up by National Cancer Registry in Finland from 1994 to 1996 to 2014
| Hp status | Risk ratio (RR) | 95% CI of RR | ||
| Hp positive (≥30 HpAb (IgG) enzyme immunoassay unit) | Hp negative (<30 HpAb (IgG) enzyme immunoassay unit) | |||
| Number of men | 6625 (6178) * | 5391 (5232)* | ||
| Number of person years | 107 714 (100 810)* | 89 961 (87 461)* | ||
| Number of cancers in follow-up by type of cancer | ||||
| Adenomatous | 3 | 11 | 0.22 | 0.05 to 0.95 |
| Squamous | 6 | 14 | 0.35 | 0.12 to 1.01 |
| Other or unknown | 1 | 4 | − | − |
| Total | 10 (7)* | 29 (28)* | 0.28 | 0.13 to 0.60 |
*Numbers in brackets give the respective number of cases after excluding the men with atrophic gastritis (serum pepsinogen I <25 µg/L).