Latency interval after diagnosis of colonic cancer (years) | ||||||
---|---|---|---|---|---|---|
<1 | 1–4 | 5–9 | 10–34 | 0–34 | 1–34 | |
Number of patients remaining in the cohort | 118 030 | 77 823 | 40 789 | 20 022 | 118 030 | 77 823 |
Number of person years at risk | 94 017 | 116 286 | 144 132 | 134 065 | 538 500 | 444 483 |
Number of observed adenocarcinomas of the oesophagus | 3 | 2 | 4 | 2 | 11 | 8 |
Number of expected adenocarcinomas of the oesophagus | 1.5 | 2.8 | 2.6 | 2.6 | 9.5 | 8.0 |
Standardised incidence ratio | 2.0 | 0.7 | 1.5 | 0.8 | 1.2 | 1.0 |
95% confidence interval | 0.4–5.8 | 0.1–2.6 | 0.4–3.9 | 0.1–2.8 | 0.6–2.1 | 0.4–2.0 |