Observed and expected numbers of pancreatic cancer deaths in an Amsterdam cohort of 2633 patients (both sexes) after gastrectomy in consecutive postoperative intervals compared with the general Dutch population
| Years since gastrectomy | No. in group | Observed pancreatic cancer deaths (o) | Expected pancreatic cancer deaths (e) | Ratio o/e | 95% CI | p Value (2 sided) |
|---|---|---|---|---|---|---|
| The period of follow up is 1935–95; the age range of the patients is 10–84 years. | ||||||
| CI, confidence interval. | ||||||
| 0–4 | 2619 | 4 | 0.90 | 4.4 | 1.2 to 11.4 | <0.05 |
| 5–14 | 2511 | 5 | 3.9 | 1.3 | 0.42 to 3.0 | 0.68 |
| 15–24 | 2087 | 8 | 6.1 | 1.3 | 0.56 to 2.6 | 0.54 |
| 25–34 | 1474 | 11 | 5.9 | 1.9 | 0.93 to 3.3 | 0.08 |
| 35–59 | 825 | 11 | 3.1 | 3.6 | 1.8 to 6.4 | <0.01 |
| 5–59 | 2511 | 35 | 19.0 | 1.8 | 1.3 to 2.6 | <0.01 |